in use

in use

adjective
1. (of facilities such as telephones or lavatories) unavailable for use by anyone else or indicating unavailability; ('engaged' is a British term for a busy telephone line); "her line is busy"; "receptionists' telephones are always engaged"; "the lavatory is in use"; "kept getting a busy signal" [syn: busy
2. currently being used; "robots are in use throughout industry" 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
In use is always a great word to know.
So is doohickey. Does it mean:
a gadget; dingus; thingumbob.
a stew of meat, vegetables, potatoes, etc.
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