(UK) On level ground. / On the same level, at grade.

(UK, dated, informal) and that's that

(Australia, New Zealand) The practice of living, with others, in a flat. / (countable) A type of paint that dries with a flat (matt) finish; a coating of such paint.

present participle of flat

The state of being flat / The state of being two-dimensional; planar : planarity / The state of being bland : dullness

plural of flat

Third-person singular simple present indicative form of flat

simple past tense and past participle of flat

plural of flatting

plural of flatness