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o.p.

  1. out of print.
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O.P.1

  1. Order of Preachers (Dominican).
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Origin of O.P.1

From the Latin word Ōrdō Praedicātōrum

O.P.2

  1. observation post.
  2. British Theater. opposite prompt.
  3. out of print.
  4. overproof.
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OP

or O.P.

  1. observation post.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for o.p.

o.p.

O.P.

abbreviation for
  1. out of print
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OP

abbreviation for
  1. military observation post
  2. Ordo Praedicatorum (the Dominicans)
  3. organophosphate
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Word Origin

(for sense 2) Latin: Order of Preachers
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012