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WordNet-Online
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Noun vapour has 2 senses
- vapor, vapour - a visible suspension in the air of particles of some substance
--1 is a kind of suspension
--1 has particulars: steam; water vapor, water vapour
- vaporization, vaporisation, vapor, vapour, evaporation - the process of becoming a vapor
--2 is a kind of phase change, phase transition, state change, physical change
--2 has particulars: boiling; clouding, clouding up; smoke, smoking
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