yelm /jɛlm/verb 2noun 1forms 3 verb2 •(dialect, UK) To choose and lay out (straw) straight to be used for animal fodder or thatching; to helm. •(dialect, UK) To choose and lay out straw straight to be used for animal fodder or thatching; to helm.[T]wo or three women are busy ‘yelming’—i.e., separating the straw, selecting the longest and laying it level and parallel, damping it with water, and preparing it for the yokes. — 1879 noun1 •(dialect, UK) A bundle of straw laid out straight, chiefly to be used for thatching; a helm.He [the thatcher] is attended by a man to carry up the ‘yelms,’ […] — 1879 formsyelmed · yelming · yelms