Contact, contact definition is - union or junction of surfaces. how to use contact in a sentence. is contact a verb?. Usage note: the verb contact is a classic example of a verb that was made from a noun and of a new usage that was initially frowned upon. the noun meaning "the state or condition of touching" is first recorded in 1626 in the writing of francis bacon. some 200 years later it spawned a verb meaning "to bring or place in contact."