Longman Dictionary of Contemporary English homepage

Topic: BIOLOGY


involuntary

adjective
     
in‧vol‧un‧ta‧ry
1HB an involuntary movement, sound, reaction etc is one that you make suddenly and without intending to because you cannot control yourself:
When Willie tapped on a window, Miguel gave an involuntary jump.
2 happening to you although you do not want it to:
involuntary part-time workers
involuntarily adverb
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