[ˈɒp(ə)rətɪv], (Adjective)

Definitions:
- functioning or having effect
(e.g: the transmitter is operative)

- relating to surgery
(e.g: wounds needing operative treatment)


Phrases:

Origin:
late Middle English: from late Latin operativus, from Latin operat- ‘done by labour’, from the verb operari (see operate)

[ˈɒp(ə)rətɪv], (Noun)

Definitions:
- a worker, especially one in a manufacturing industry
(e.g: the operatives clean the machines at the end of every shift)

- a secret agent or private detective
(e.g: a CIA operative)


Phrases:

Origin:
late Middle English: from late Latin operativus, from Latin operat- ‘done by labour’, from the verb operari (see operate)