Extend  v. 1 lengthen or make larger in space or time. 2 stretch or lay out at full length. 3 (foll. By to, over) reach or be or make continuous over a specified area. 4 (foll. By to) have a specified scope (permit does not extend to camping). 5 offer or accord (an invitation, hospitality, kindness, etc.). 6 (usu. Refl. Or in passive) tax the powers of (an athlete, horse, etc.).  extendible adj. (also extensible). [latin extendo -tens-: related to *tend1]