thirty-one

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thirty-one

1. The cardinal number immediately following thirty and before thirty-two; thirty plus one.
   • c. 1606 (date written), William Shakespeare, “The Tragedie of Macbeth”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene i], page 143, column 2:

     Toad, that vnder cold ſtone, / Dayes and Nights ha's thirty one: / Sweltred Venom ſleeping got, / Boyle thou firſt i'th'charmed pot.

• Symbolic: 31
• Roman symbols: XXXI

• thirty-first
• thirty-oneth