noun
something that you say or do to find out what people think about a course of action before you take it
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WORD ORIGIN
1930s: from translation of French ballon d'essai .
noun
something that you say or do to find out what people think about a course of action before you take it
••
WORD ORIGIN
1930s: from translation of French ballon d'essai .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005