(New American Roget's College Thesaurus)
v. determine, elect, choose, settle, fix; make up one's mind; arbitrate. See resolution, choice, certainty, cause. Ant., vacillate, straddle the fence.
(Roget's IV) v.
Syn. settle, settle upon, fix upon, determine, judge, conclude, resolve, adjudge, adjudicate, mediate, conciliate, arbitrate, compromise, award, choose, elect, rule, vote, poll, form a resolution, settle in one's mind, make a decision, come to a conclusion, form an opinion, form a judgment, make up one's mind, make a selection, select, pick, make one's choice, commit oneself, draw a conclusion, come to an agreement, arrive at a conclusion, cast the die, fix on, have the final word, clinch; see also resolve 1 .
Ant. delay*, hesitate, hedge.
Syn.- decide implies the bringing to an end of vacillation, doubt, dispute, etc. by making up one's mind as to an action, course, or judgment; determine in addition suggests that the form, character, function, scope, etc. of something are precisely fixed [ the club decided on a lecture series and appointed a committee to determine the speakers, the dates, etc. ] ; settle stresses finality in a decision, often one arrived at by arbitration, and implies the termination of all doubt or controversy; to conclude is to decide after careful investigation or reasoning; resolve implies either finding a solution to a problem [ to resolve a longing-standing issue ] or a firmness of intention to carry through a decision [ he resolved to lose 10 pounds ]
(Roget's 3 Superthesaurus) v.
settle, determine, choose, opt, judge, commit oneself, elect, guess, rule, make up one's mind, *fish or cut bait, resolve.
ANT.: vacillate, waver, *ride the fence, hemandhaw, waffle
(Roget's Thesaurus II) verb 1. To make a decision about (a controversy or dispute, for example) after deliberation, as in a court of law: adjudge, adjudicate, arbitrate, decree, determine, judge, referee, rule, umpire. See DECIDE, LAW. 2. To make up or cause to make up one's mind: conclude, determine, resolve, settle. See DECIDE.

English dictionary for students. 2013.