Extremely thin, like a twig.

(simile, rare) Very thin, unhealthily thin.

very thin, as paper is; insubstantial.

Somewhat cylindrical and slender like a pencil; also, tall and thin.

light and thin / (figuratively, by extension) having a flimsy factual basis; unsubstantiated, hard to believe

(intransitive) To be nearly used up or consumed, so that little remains.

(electronics) (of a circuit, electronic, etc.) Made with thin films deposited on a ceramic or glass substrate.

A layer of material deposited on a substrate as a coating of one atom or one molecule in thickness.

(analytical chemistry) A form of chromatography in which the solid phase is silica gel or a similar inert material supported on a glass plate.

(analytical chemistry) Alternative spelling of thin-layer chromatography