( US vapor )
■ noun
1》 a substance diffused or suspended in the air.
↘ Physics a gaseous substance that can be liquefied by pressure alone. Compare with gas .
2》 ( the ~s ) dated sudden faintness or nervousness.
■ verb talk in a vacuous or pompous way.
Derivatives
vaporous adjective
vaporousness noun
~ish adjective ( archaic ).
~y adjective
Origin
ME: from OFr., or from L. vapor 'steam, heat'.