1. 
[syn: hasty, overhasty, precipitate, precipitant, precipitous]
The Collaborative International Dictionary of English v.0.48:
Overhasty \O"ver*has"ty\, a.
   Too hasty; precipitate; rash. -- O"ver*has"ti*ly, adv. --
   O`ver*has"ti*ness, n.
   [1913 Webster]
WordNet (r) 3.0 (2006):
overhasty
    adj 1: done with very great haste and without due deliberation;
           "hasty marriage seldom proveth well"- Shakespeare; "hasty
           makeshifts take the place of planning"- Arthur Geddes;
           "rejected what was regarded as an overhasty plan for
           reconversion"; "wondered whether they had been rather
           precipitate in deposing the king" [syn: hasty,
           overhasty, precipitate, precipitant, precipitous]