Definitions
1.nounA sport played by four players where players have to hit a ball into other people's squares, and attempt to make a return hit.
2.nounA four-square cipher
3.adjectiveHaving four equal sides; square.
4.adjective(by extension) Solid, robust.
5.adjectivePertaining to a four-square cipher.
6.adjectiveA boxy style of domestic architecture with four rooms to a floor, one of which is usually a stair hall.
7.adjectivePertaining to the International Church of the Foursquare Gospel.