Etymology 1 
From Middle English werking, werkynge, warkynge, worchinge, from Old English wyrcung (“working, work”), verbal noun of wyrcan (“to work”), equivalent to work + -ing. Cognate with Scots wirking, warking, Dutch werking, German Wirkung.
working (plural workings)
- (usually plural) Operation; action.
- Method of operation.
- (of bodies of water) To become full of a vegetable substance.
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Etymology 2 
- Present participle of work.
- Leave him alone, he's working.
- That is or are functioning.
- a working ventilator
- That suffices but requires additional work.
- a working copy of the script
- In paid employment.
- working mothers
- Of or relating to employment.
- the working week
- Enough to allow one to use something.
- a working knowledge of computers
- (functioning): functioning; up (mainly used of computers)
- (that suffices but requires further work): draft, provisional, temporary
- (in paid employment): employed, in employment
- (of or relating to employment): work
- (enough to allow one to use something): basic
Related terms 
- working in The Century Dictionary, The Century Co., New York, 1911