OP

noun

OP stands for Overall Position.

意味（1）

Initialism of Overall Position.

意味（2）

(theater) Initialism of opposite prompt; stage right.

意味（3）

(Internet) Initialism of original poster; the person who started a thread.

I don't think your response really answers the OP's question.

意味（4）

(Internet) Initialism of original post.

意味（5）

(military, law enforcement) Initialism of observation post.

意味（6）

(organic chemistry) Abbreviation of organophosphate.

意味（7）

(slang) Initialism of other person's; a cigarette cadged from someone.