1.
to become separated from sth it was stuck or fastened to :
The flap of the envelope had come unstuck.
2.
( BrE , informal ) ( of a person, plan, etc. ) to fail completely, with bad results
1.
to become separated from sth it was stuck or fastened to :
The flap of the envelope had come unstuck.
2.
( BrE , informal ) ( of a person, plan, etc. ) to fail completely, with bad results
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005