Definition of decision noun from the Oxford Advanced Learner's Dictionary

Oxford3000

decision

noun
dɪˈsɪʒn
 
; dɪˈsɪʒn
 
 
1 [countable] decision (on/about something)| decision (to do something) a choice or judgement that you make after thinking and talking about what is the best thing to doto make a decision(= to decide) (British English) to take a decision(= to decide)We need a decision on this by next week.Who took the decision to go ahead with the project?He is really bad at making decisions.We finally reached a decision(= decided after some difficulty).We must come to a decision about what to do next by tomorrow.a big (= an important) decisionThe final decision is yours.It's a difficult decision for any doctor.The editor's decision is final.Mary is the decision-maker in the house.The decisions by the management committee will affect everyone in the company.2 (also decisiveness) [uncountable] the ability to decide something clearly and quicklyThis is not a job for someone who lacks decision.
Opposite
indecision
3 [uncountable] the process of deciding somethingThe moment of decision had arrived.The power of decision remained with the directors.