(letterpress typography) A metal block used to separate words, one fifth of an em in width. / (typography) In digital text, a character representing a thin space.

plural of thin space

(idiomatic) To lessen or weaken over time, as from overuse.

Third-person singular simple present indicative form of wear thin

simple past tense of wear thin

present participle of wear thin

past participle of wear thin

(idiomatic, figuratively, usually humorous) An unknown location.

Third-person singular simple present indicative form of thin out

simple past tense and past participle of thin out