n.
Pronunciation: ' tip- ˌ t ō , - ' t ō
Function: noun
Date: 14th century
: the position of being balanced on the balls of the feet and toes with the heels raised ― usually used with on also : the ends of the toes
– on tiptoe : ALERT , AROUSED <the contest of skill that puts one on tiptoe to win ― Deerfield (Wisc.) Independent >