At the age of 80, she's 'riding a/the wave of' renewed interest in her work. [=she's experiencing a time when many people are interested in her work again]
The traffic cop 'waved' cars 'through'. [=waved in a way that told drivers to continue driving through a particular area]
The new school has triggered a 'wave' of optimism [=has made many people feel optimistic] about the public school system.
(..) Dialogue: Marked=..,Default,NTP,!Effect,...that your mother and father were\Nin here buying their first wands. Dialogue: Marked=..,Default,NTP,!Effect,Here we are. Dialogue: Marked=..,Default,NTP,!Effect,Give it a wave. Dialogue: Marked=..,Default,NTP,!Effect,Apparently not. (..)2001 Harry Potter and the Sorcerer's Stone