[warn] vb [ME, fr. OE warnian; akin to OHG warnon to take heed, OE waer careful, aware--more at wary] vt (bef. 12c) 1 a: to give notice to beforehand esp. of danger or evil b: to give admonishing advice to: counsel c: to call to one's attention: inform
2: to order to go or stay away--often used with off ~ vi: to give a warning -- warn.er n