Definitions

1. noun

an operator or a company that provides telephone services

“She worked for the local op in the city.”

2. noun

a shortening of the name of an opera or a musical composition

“The op was a famous production of La Bohème.”

3. interjection

used to express approval or agreement

“Op, that’s a great idea!”

4. verb

to operate or run a telephone system

“The company will op the new network soon.”