[verb] - (of a flag, sail or banner) to become open from a rolled position, or to cause (a flag, etc.) to do thisThe demonstrators unfurled a banner which said 'Liberty will die with us.' [T]The flags unfurled in the breeze. [I](figurative literary) She could see in his baby features an adult face waiting to unfurl (= develop). [I]
UNFURL
Meaning of UNFURL in English
Cambridge English vocab. Кембриджский английский словарь. 2012