diff --git a/README.md b/README.md
index 4854d7de0e..461e8cea78 100644
--- a/README.md
+++ b/README.md
@@ -45,7 +45,7 @@ or to generate the body of an email. In Rails, View generation is handled by [Ac
 [Active Record](activerecord/README.rdoc), [Active Model](activemodel/README.rdoc), [Action Pack](actionpack/README.rdoc), and [Action View](actionview/README.rdoc) can each be used independently outside Rails.
 In addition to that, Rails also comes with [Action Mailer](actionmailer/README.rdoc), a library
 to generate and send emails; [Active Job](activejob/README.md), a
-framework for declaring jobs and making them run on a variety of queueing
+framework for declaring jobs and making them run on a variety of queuing
 backends; [Action Cable](actioncable/README.md), a framework to
 integrate WebSockets with a Rails application; [Active Storage](activestorage/README.md), a library to attach cloud
 and local files to Rails applications;
diff --git a/activejob/README.md b/activejob/README.md
index d49fcfe3c2..a2a5289ab7 100644
--- a/activejob/README.md
+++ b/activejob/README.md
@@ -1,7 +1,7 @@
 # Active Job -- Make work happen later
 
 Active Job is a framework for declaring jobs and making them run on a variety
-of queueing backends. These jobs can be everything from regularly scheduled
+of queuing backends. These jobs can be everything from regularly scheduled
 clean-ups, to billing charges, to mailings. Anything that can be chopped up into
 small units of work and run in parallel, really.
 
@@ -20,7 +20,7 @@ switch between them without having to rewrite your jobs.
 
 ## Usage
 
-To learn how to use your preferred queueing backend see its adapter
+To learn how to use your preferred queuing backend see its adapter
 documentation at
 [ActiveJob::QueueAdapters](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 
@@ -39,7 +39,7 @@ end
 Enqueue a job like so:
 
 ```ruby
-MyJob.perform_later record  # Enqueue a job to be performed as soon as the queueing system is free.
+MyJob.perform_later record  # Enqueue a job to be performed as soon as the queuing system is free.
 ```
 
 ```ruby
@@ -82,9 +82,9 @@ This works with any class that mixes in GlobalID::Identification, which
 by default has been mixed into Active Record classes.
 
 
-## Supported queueing systems
+## Supported queuing systems
 
-Active Job has built-in adapters for multiple queueing backends (Sidekiq,
+Active Job has built-in adapters for multiple queuing backends (Sidekiq,
 Resque, Delayed Job and others). To get an up-to-date list of the adapters
 see the API Documentation for [ActiveJob::QueueAdapters](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 
diff --git a/activejob/activejob.gemspec b/activejob/activejob.gemspec
index cd7ac210ec..20b9d4ccdd 100644
--- a/activejob/activejob.gemspec
+++ b/activejob/activejob.gemspec
@@ -7,7 +7,7 @@ Gem::Specification.new do |s|
   s.name        = "activejob"
   s.version     = version
   s.summary     = "Job framework with pluggable queues."
-  s.description = "Declare job classes that can be run by a variety of queueing backends."
+  s.description = "Declare job classes that can be run by a variety of queuing backends."
 
   s.required_ruby_version = ">= 2.4.1"
 
diff --git a/activejob/lib/active_job/base.rb b/activejob/lib/active_job/base.rb
index 95b1062701..ed41fac4b8 100644
--- a/activejob/lib/active_job/base.rb
+++ b/activejob/lib/active_job/base.rb
@@ -40,7 +40,7 @@ module ActiveJob #:nodoc:
   # Records that are passed in are serialized/deserialized using Global
   # ID. More information can be found in Arguments.
   #
-  # To enqueue a job to be performed as soon as the queueing system is free:
+  # To enqueue a job to be performed as soon as the queuing system is free:
   #
   #   ProcessPhotoJob.perform_later(photo)
   #
diff --git a/activejob/lib/active_job/callbacks.rb b/activejob/lib/active_job/callbacks.rb
index 334b24fb3b..61317c7cfc 100644
--- a/activejob/lib/active_job/callbacks.rb
+++ b/activejob/lib/active_job/callbacks.rb
@@ -130,7 +130,7 @@ module ActiveJob
         set_callback(:enqueue, :after, *filters, &blk)
       end
 
-      # Defines a callback that will get called around the enqueueing
+      # Defines a callback that will get called around the enqueuing
       # of the job.
       #
       #   class VideoProcessJob < ActiveJob::Base
diff --git a/activejob/lib/active_job/core.rb b/activejob/lib/active_job/core.rb
index 62bb5861bb..698153636b 100644
--- a/activejob/lib/active_job/core.rb
+++ b/activejob/lib/active_job/core.rb
@@ -78,7 +78,7 @@ module ActiveJob
     end
 
     # Returns a hash with the job data that can safely be passed to the
-    # queueing adapter.
+    # queuing adapter.
     def serialize
       {
         "job_class"  => self.class.name,
diff --git a/activejob/lib/active_job/execution.rb b/activejob/lib/active_job/execution.rb
index f5a343311f..e96dbcd4c9 100644
--- a/activejob/lib/active_job/execution.rb
+++ b/activejob/lib/active_job/execution.rb
@@ -26,7 +26,7 @@ module ActiveJob
       end
     end
 
-    # Performs the job immediately. The job is not sent to the queueing adapter
+    # Performs the job immediately. The job is not sent to the queuing adapter
     # but directly executed by blocking the execution of others until it's finished.
     #
     #   MyJob.new(*args).perform_now
diff --git a/activejob/lib/active_job/queue_adapters.rb b/activejob/lib/active_job/queue_adapters.rb
index 3e3a474fbb..525e79e302 100644
--- a/activejob/lib/active_job/queue_adapters.rb
+++ b/activejob/lib/active_job/queue_adapters.rb
@@ -3,7 +3,7 @@
 module ActiveJob
   # == Active Job adapters
   #
-  # Active Job has adapters for the following queueing backends:
+  # Active Job has adapters for the following queuing backends:
   #
   # * {Backburner}[https://github.com/nesquena/backburner]
   # * {Delayed Job}[https://github.com/collectiveidea/delayed_job]
@@ -52,7 +52,7 @@ module ActiveJob
   #
   # No: The adapter will run jobs at the next opportunity and cannot use perform_later.
   #
-  # N/A: The adapter does not support queueing.
+  # N/A: The adapter does not support queuing.
   #
   # NOTE:
   # queue_classic supports job scheduling since version 3.1.
@@ -74,7 +74,7 @@ module ActiveJob
   #
   # No: Does not allow the priority of jobs to be configured.
   #
-  # N/A: The adapter does not support queueing, and therefore sorting them.
+  # N/A: The adapter does not support queuing, and therefore sorting them.
   #
   # ==== Timeout
   #
diff --git a/guides/source/configuring.md b/guides/source/configuring.md
index 706964090e..de6766e12e 100644
--- a/guides/source/configuring.md
+++ b/guides/source/configuring.md
@@ -731,7 +731,7 @@ There are a few configuration options available in Active Support:
 
 `config.active_job` provides the following configuration options:
 
-* `config.active_job.queue_adapter` sets the adapter for the queueing backend. The default adapter is `:async`. For an up-to-date list of built-in adapters see the [ActiveJob::QueueAdapters API documentation](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
+* `config.active_job.queue_adapter` sets the adapter for the queuing backend. The default adapter is `:async`. For an up-to-date list of built-in adapters see the [ActiveJob::QueueAdapters API documentation](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 
     ```ruby
     # Be sure to have the adapter's gem in your Gemfile