We found 4 definitions of out of the blue from 3 different sources.
Adjective |
||
out of the blue - not anticipated; "unanticipated and disconcerting lines of development"- H.W.Glidden; "unforeseen circumstances"; "a virtue unlooked-for in people so full of energy"; "like a bolt out of the blue" | ||
unanticipated, unforeseen, unlooked-for | ||
Adverb |
||
out of the blue - in a way that was not expected; "her brother showed up at the wedding out of the blue" | ||
unexpectedly |