['ɔpə'reɪʃ(ə)n] n This HTML5 player is not supported by your browser
droit. céim oibre micr. oibríocht (In mathematics, an action performed on a set of entities that produces a new entity. Examples of mathematical operations are addition and subtraction) génér. gníomhaíocht Anglais glossaire abrév., inform. o milit., abrév. op ; oper milit., logist. Organised set of actions carried out, generally, by a joint force, or even an interallied or multinational one, on one or several field s of operations, in order to reach one or several military target s . (FRA) états. A sequence of tactical actions with a common purpose or unifying theme (JP 1) ; A military action or the carrying out of a strategic, operational, tactical, service, training, or administrative military mission (JP 3-0) abrév., transp. oprtns (mouss entr., abrév. o
