adjective

thin

thin, slim, slender, sparse

This is a very thin book.

This is a very thin book.

He is a tall, thin man.

He is a tall, thin man.

The soup is too thin.

The soup is too thin.

His hair is getting thin.

His hair is getting thin.

((thin)) + ((noun)) having a small distance between two opposite sides This is a very thin book.

((sb./sth.)) + is/are + ((thin)) not fat; slim He is a tall, thin man.

Synonyms: slim, slender, lean; Antonyms: thick, fat, dense

From Old English 'þynne', meaning 'stretched out' or 'spread out'.

Think of a 'thin' line. It applies to many things: thin paper, a thin person, thin soup (watery), or thin hair (not dense).

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