[ blast-awf, -of, blahst- ]
/ ˈblæstˌɔf, -ˌɒf, ˈblɑst- /

noun Aerospace.

the launching of a rocket, guided missile, or spacecraft.

Origin of blastoff

First recorded in 1950–55; noun use of verb phrase blast off Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for blastoff

British Dictionary definitions for blastoff


/ (ˈblɑːstˌɒf) /


the launching of a rocket under its own power
the time at which this occurs

verb blast off

(adverb; when tr, usually passive) (of a rocket, spacemen, etc) to be launched
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012