[UNDER-1 8 b, 10 a.]
1. refl. To play below ones ability.
1733. Ld. Harvey, in Craftsman, No. 376. No person is ever known to flatter at this game [sc. chess], by underplaying himself.
2. intr. To play a low card, though holding a high one of the same suit, in hope of later advantage. (Also used trans.)
1850. Bohns Handbk. Games, 21. To under-play, he wins the trick with the ace, and returns the small one.
1863. Cavendish, Whist (ed. 5), 42. Experienced players frequently endeavour to obtain the entire command of their suit by underplaying.