spe‧ci‧fy W3 AC / spesəfaɪ, spesɪfaɪ / 动词 ( past tense and past participle specified , present participle specifying , third person singular specifies ) [及物动词]

to state something in an exact and detailed way :

Payments will be made for a specified number of months.

specify who/what/how etc

Regulations specify how long maintenance crews can work.

specify that

The rules clearly specify that competitors must not accept payment.