- (countable) An addition or annex to a group, set, or total.
- The poem was a new in the textbook.
- (uncountable) The act of include, including, i.e. adding or annexing, (something) to a group, set, or total.
- The inclusion of the poem added value to the course.
- Inside or within a cell.
- an process
- (medicine) The invagination of one portion of a tubular anatomical structure (especially intestines or blood vessels) within the next.