overcall
verb
over·call ˌō-vər-ˈkȯl 
overcalled; overcalling; overcalls
transitive verb
: to make a higher bid than (the previous bid or bidder) in a card game
intransitive verb
: to bid over an opponent's bid in bridge when one's partner has not bid or doubled
overcall
ˈō-vər-ˌkȯl
noun 
Example Sentences
Recent Examples on the Web West led a club — East had overcalled — and East played the eight to keep communication. 
Frank Stewart, The Mercury News, 8 Aug. 2019 Some would double, and a few brave souls — those who aren’t terrified of being minus 800 — would overcall 1NT. Kathleen Saxe, The Mercury News, 19 July 2019 Your partner overcalls one heart, and the next player passes. Frank Stewart, The Mercury News, 10 May 2017
Frank Stewart, The Mercury News, 8 Aug. 2019 Some would double, and a few brave souls — those who aren’t terrified of being minus 800 — would overcall 1NT. Kathleen Saxe, The Mercury News, 19 July 2019 Your partner overcalls one heart, and the next player passes. Frank Stewart, The Mercury News, 10 May 2017 Word History
First Known Use
1889, in the meaning defined at transitive sense