Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.


I didn't expect the blow-off to come like this; I didn't expect to be caught in it when it did happen.

I suppose she needed that blow-off, like an engine too full of steam.

The tank is emptied, when necessary, through the blow-off cock, S.

At the end of its cone-shaped bottom it terminates in a blow-off tube, having in it a grate formed of sharp-edged bars.

Where Henze steamers are used they are arranged in batteries, the blow-off pipes being connected to the preparatory mash vats.

Blow-off cock in back or side of furnace operated from the footboard.

The blow-off pipe c is for emptying or blowing down the boiler.

I want you to help me fix the fire hose, the short length, to that blow-off cock at the bottom of the boiler.

This operation should be begun at the bottom of the boiler near the blow-off plug, and be continued in advancing toward the top.

The cut tubes fall to the bottom of the boiler, and are removed through the blow-off hole of the front tube-plate.


"move air," Old English blawan "blow, breathe, make an air current; kindle; inflate; sound a wind instrument" (class VII strong verb; past tense bleow, past participle blawen), from Proto-Germanic *blæ-anan (cf. Old High German blaen, German blähen), from PIE *bhle- "to swell, blow up" (cf. Latin flare "to blow"), possibly identical with *bhel- (2) "to blow, swell" (see bole).

Meaning "to squander" (of money) is from 1874. Sense of "depart suddenly" is from 1902. Slang "do fellatio on" sense is from 1933, as blow (someone) off, originally among prostitutes (cf. blow job). This usage probably is not connected to the colloquial imprecation (1781, associated with sailors, e.g. Popeye's "well, blow me down!"), which has past participle blowed. Meaning "to spend (money) foolishly and all at once" is 1890s; that of "bungle an opportunity" is from 1943. To blow over "pass" is from 1610s, originally of storms. To blow (someone's) mind was in use by 1967; there is a song title "Blow Your Mind" released in a 1965 Mirawood recording by a group called The Gas Company.


Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.