Real Dictionary

interrupt
verb: If you interrupt someone who is speaking, you say or do something that causes them to stop.

interrupt in American English
to break into or in upon (a discussion, train of thought, etc.)
to make an interruption, esp. in another's speech, action, etc.
intransitive verb: to cause a break or discontinuance; interfere with action or speech, esp. by interjecting a remark
noun: 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
transitive verb: to cause or make a break in the continuity or uniformity of (a course, process, condition, etc.)

interrupt in British English
noun: the signal to initiate the stopping of the running of one computer program in order to run another, after which the running of the original program is usually continued
verb: to break the continuity of (an action, event, etc) or hinder (a person) by intrusion