To consider as part of something; to comprehend.
To use a directive that allows the use of source code from another file.
To bring into a group, class, set, or total as a (new) part or member.
A piece of source code or other content that is dynamically retrieved for inclusion in another item.
Used other than figuratively or idiomatically: see work, in.
To find time or space for, amid other things.
To work out using a machine in between the sets of someone who is already using that machine.