Definition of all-play-all in English:

all-play-all

adjective

Chess
  • Of, relating to, or designating a chess tournament in which each of the players plays each of the others in turn.

noun

Chess
  • An all-play-all tournament.

Origin

1950s; earliest use found in British Chess Magazine. From all noun + play + all noun.

Pronunciation

all-play-all

/ˌɔːl pleɪ ˈɔːl/