Emily Dickinson Lexicon

VA'POR, v.i. [L. vaporo.]

1. To pass off in fumes or a moist floating substance; to steam; to be exhaled; to evaporate. [In this sense, evaporate is generally used.]
2. To emit fumes. Running water vapors not so much as standing water. [Little used.] – Bacon.
3. To bully; to boast or vaunt with a vain, ostentatious display of worth; to brag. [This is the most usual signification of the word.] And what in real value's wanting, / Supply with vaporing and ranting. – Hudibras.