What is the meaning of Straight?

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

Direct, undeviating.

Perfectly horizontal or vertical; not diagonal or oblique.

Describing the bat as held so as not to incline to either side; on, or near a line running between the two wickets.

Having all cylinders in a single straight line; in-line.

Direct in communication; unevasive, straightforward.

Free from dishonesty; honest, law-abiding.

Serious rather than comedic.

In proper order; as it should be.

In a row, in unbroken sequence; consecutive.

Describing the sets in a match of which the winner did not lose a single set.

Making no exceptions or deviations in one's support of the organization and candidates of a political party.

Containing the names of all the regularly nominated candidates of a single party and no others.

Conventional; mainstream; socially acceptable.

Heterosexual.

Occurring between people of opposite sex (sometimes, but not always, specifically between heterosexual people).

Related to conventional sexual intercourse.

Not using alcohol, drugs, etc.

Not plus size; thin.

Strait; narrow.

Stretched out; fully extended.

Thorough; utter; unqualified.

Of spirits: undiluted, unmixed; neat.

Sent at a full rate for immediate delivery; being a fast telegram.

Concerning the property allowing the parallel transport of vectors along a course that keeps tangent vectors remain as such throughout that course (a course which is straight, a straight curve, is a geodesic).

OK, all right, fine; in a good state or situation.

On good terms.

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

Directly; without pause, delay or detour.

Continuously; without interruption or pause.

Of speech or information, without prevarication or holding back; directly; straightforwardly; plainly.

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

Five cards in sequence.

A heterosexual.

A normal person; someone in mainstream society.

A cigarette, particularly one containing tobacco instead of marijuana.

A chiropractor who relies solely on spinal adjustment, with no other treatments.

A cat that has straight ears despite belonging to a breed that often has folded ears.

To straighten.

Of a work of art: played straight, not daring to break conventions.

straight, heterosexual

straight, directly

straight (five cards in sequence)

Source: wiktionary.org