(transitive) To cause to become straight. / (intransitive) To become straight. / (transitive) To put in order; to sort; to tidy up. / (transitive) To clarify a situation or concept to (an audience).

The state or quality of being straightforward.

In a straightforward manner.

A straight section of a racetrack.

(dated) Synonym of straightaway or straight away (at once, immediately). / Directly.

simple past tense and past participle of straighten

plural of straightedge

plural of straightener

In a straight manner; without curve or bend. / Without deviation; directly. / Immediately; straightaway.

Third-person singular simple present indicative form of straighten