op |äp|
noun informal
a surgical or other operation.
op-
suffix
1 variant spelling of ob-
2 assimilated before p (as in oppress, oppugn).
OP
abbreviation
• observation post.
• (in the theater) opposite prompt.
• organophosphate(s).
• (in the Roman Catholic Church) Ordo Praedicatorum Order of Preachers (Dominican).