Dare  —v. (-ring; 3rd sing. Present usu. Dare before an expressed or implied infinitive without to) 1 (foll. By infin. With or without to) have the courage or impudence (to) (dare he do it?; if they dare to come; how dare you?). 2 (usu. Foll. By to + infin.) Defy or challenge (i dare you to own up). —n. 1 act of daring. 2 challenge, esp. To prove courage.  i dare say 1 (often foll. By that) it is probable. 2 probably; i grant that much. [old english]