(archaic) straightforward language; straight talk.

(archaic) Straightforward, honest.

(Singapore) Tap water, either hot or cold, served in restaurants. / (Malaysia) Drinking water

plural of plain point

(typography, obsolete) Synonym of full stop or period ⟨.⟩.

(astronomy) A large impact crater that has a relatively flat floor, surrounded by a wall

plural of walled plain

(simile) Very clear and evident.

(simile) Very clear and evident. / (simile) Very unattractive or unprepossessing.

Synonym of Northeast China Plain