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flat

adjective

/flæt/

Meaning

Smooth and level, without raised areas or curves.

The road ahead was completely flat.

fall flat

even, smooth, level, plain, horizontal

bumpy, uneven, rough

flat surface, flat tire, flat rate, flat shoes

unable to be appeased, calmed, or pacified

Pleasing to the ear; having a sweet sound.

bad-tempered, irritable, spiteful

speaking in a loud, rhetorical, or dramatic way

Slightly sour or acidic in taste or nature.

Allowing a two-way flow of information between it and a user, responding to the user's input.