n. A fork for lifting and pitching hay or the like.n. A tuning-fork.To lift or throw with a pitchfork.To put, throw, or thrust suddenly or abruptly into any position.n. plural Either Bidens cernua, the nodding bur-marigold, or B. frondosa, the black beggar-ticks: so called from the two prong-like awns of the adhesive achenes. See devil's-pitchforks.