straight

Something that is not crooked or bent such as a part of a road or track.

Five cards in sequence.

A heterosexual.

"My friends call straights "heteros"."

Similar: breeder, hetero

To straighten.

Not crooked or bent; having a constant direction throughout its length.

(of a path, trajectory, etc.) Direct, undeviating.

Perfectly horizontal or vertical; not diagonal or oblique.

Of a direction relative to the subject, precisely; as if following a direct line.

"Go straight back."

Directly; without pause, delay or detour.

"On arriving at work, he went straight to his office."

Continuously; without interruption or pause.

"He claims he can hold his breath for three minutes straight."