plural of back straight

(idiomatic) A person of conventional morality

A straight red card

(firearms) Alternative spelling of straight-pull

(architecture, of a floor) Whose boards are laid so that the joints form a continued line transverse to the length of the boards themselves.

A form of pool involving fifteen numbered balls, whose value is added to the score of the player who pots them.

(simile) Very straight; travelling in a very straight trajectory. / (simile, by extension) Having no homosexual desires or thoughts; completely heterosexual.

(idiomatic) To avoid confusing or mixing up something; to keep something clear or organized.

plural of straight line

(tennis, of a victory or a loss in a match) Achieved in the minimal possible number of sets.