Inflected forms: pl. for·ties 1. The cardinal number equal to 4 × 10. 2.fortiesa. A decade or the numbers from 40 to 49: They stopped smoking in their forties. At night the temperature fell into the forties.b. often Forties The decade from 40 to 49 in a century.
ETYMOLOGY:
Middle English, from Old English fowertig. See kwetwer- in Appendix I.
fôr
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