Operative (Adjective)– Functioning or producing a desired effect.

(Pronounced op-uh-ruh-tive)

To remember the definition of the word operative, use the following mnemonic:

The operation was effective (operative) in producing the desired effect. He was now a functioning cyborg.

Examples of operative in a sentence

The government ceased to be operative.

The pilot had to check that the auto pilot was operative.

The operative word here is to have fun.