op

noun6

1. •
   (informal) An amateur radio operator.
2. •
   (informal) Clipping of operation.

   • My mother's going in for her knee op today.
3. •
   (Internet, informal) An operator on IRC, who can moderate the chat channel, ban users, etc.
4. •
   (informal) Clipping of operator.

   • Even given the same direction, two camera ops will see and shoot somewhat differently. A good eye and an ability to concentrate and quickly follow directions are necessary for this position. — 2015
5. •
   [before a noun] Ellipsis of op art.
6. •
   [in the plural] (Internet) Clipping of opinion.

   • Ops on my new drawing?

verb3

1. •
   (Australia, informal) To buy (something) from an op shop.
2. •
   (Australia, informal) To shop at op shops.
3. •
   (Internet) To promote (an IRC user) to an operator.

noun7

1. •
   Operation.
2. •
   (informal) Opportunity.

   • photo op.
3. •
   Operative.
4. •
   A detective.
5. •
   Opus.
6. •
   Operator.
7. •
   An operator's license, usually ops

adjective4

1. •
   Abbreviation of overpowered.

   • I know they are going to tweak stuff in the next few weeks with patches as they find one class is OP and another is sucking... — 2012
2. •
   Abbreviation of out of print.
3. •
   (Internet) Initialism of overplayed.
4. •
   Abbreviation of overproof.

noun10

1. •
   (Internet) Initialism of original poster; the person who started a thread.

   • I don't think your response really answers OP's question.
2. •
   Abbreviation of opening credits.
3. •
   Abbreviation of opening theme.
4. •
   Abbreviation of outpatient.
5. •
   Initialism of observation post.
6. •
   Abbreviation of organophosphate.
7. •
   Initialism of opposite prompt; stage right.
8. •
   Initialism of Overall Position.
9. •
   Abbreviation of original publishing.
10. •
    (slang) Initialism of other person's; a cigarette cadged from someone.

noun2

1. •
   Opus.
2. •
   Abbreviation of opinion.