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Wiktionary
forty-first

n. (context fractional English) One of forty-one equal parts of a whole. num. (context ordinal English) The ordinal form of the number forty-one, describing a person or thing in position number 41 of a sequence.

WordNet
forty-first

adj. the ordinal number of forty-one in counting order [syn: 41st]

Usage examples of "forty-first".

Just give me one brigade of the Forty-First Division, and we can stop them before Quantico.