1. to cause or make a break in the continuity or uniformity of (a course, process, condition, etc.).
2. to break off or cause to cease, as in the middle of something: He interrupted his work to answer the bell.
3. to stop (a person) in the midst of doing or saying something, esp. by an interjected remark: May I interrupt you to comment on your last remark?
to cause a break or discontinuance; interfere with action or speech, esp. by interjecting a remark: Please don't interrupt.
Computers.a hardware signal that breaks the flow of program execution and transfers control to a predetermined storage location so that another procedure can be followed or a new operation carried out.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.