fam. [f. prec. + -ER.] He who, or that which, is all round; hence applied to a man who is able ‘all round’; to a collar which fits all round, etc.

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1860.  All Y. Round, No. 42. 369. That particularly demonstrative type of the [collar] species known as ‘the all-rounder!’

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1865.  Ld. Strangford, Selection (1869), II. 163. Dressed in full uniform, with high stand-up collar; the modern all-rounder not having got so far into Asia.

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