de‧ci‧sion S1 W1
1 [countable] a choice or judgment that you make after a period of discussion or thoughtCOLLOCATIONS COLLOCATIONS
make a decision take a decision (=make an important decision, especially after considering carefully) reach/come to a decision a big/major decision a difficult/hard/tough etc decision decision to do something the right/wrong decision reverse/overturn a decision (=officially change an earlier decision) somebody's decision is final (=it cannot be changed) a snap decision (=one made extremely quickly)
Do you ever wonder if you made the right decision?
No final decision has been taken, but it seems likely that the two companies could merge in the near future.
decision about/on
We finally came to a firm decision on the matter.
They can help with decisions about where to invest your money.
I need to think about it. It's a big decision.
All managers face tough decisions at one time or another.
She refused to discuss her decision to quit the group.
decision as to which/whether/who etc
Viewers make the final decision as to who should be eliminated from the competition.
The Supreme Court has overturned the lower court's decision.
The judges' decision is final.
She made a snap decision, which was to have fatal consequences.
What were the reasons behind your decision?
2 [uncountable] the quality someone has that makes them able to make choices or judgments quickly and confidently [≠ indecision]:
the ability to act with speed and decision
3 [uncountable] the act of deciding something:
The Court has the ultimate power of decision.

Dictionary results for "decision"
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