noun Chiefly British.
Related formstwelve·month·ly, adverb
Examples from the Web for twelvemonth
Spongy metallic iron is more energetic in its action than charcoal, and remains serviceable for a twelvemonth.Cooley's Practical Receipts, Volume II|Arnold Cooley
A man should have this picture a twelvemonth in his collection before he can discover half its beauties!'Caricature and Other Comic Art|James Parton.
Fintan: Amn't I tired telling you this day in the place of this day twelvemonth.Three Wonder Plays|Lady I. A. Gregory
Twice, during the twelvemonth, he tackled pieces which he described to Madame Hanska.Balzac|Frederick Lawton
As young Turner said, they might easily in this way swear him into jail for a twelvemonth.The Life of Thomas Wanless, Peasant|Alexander Johnstone Wilson