Meaning : Reach, make, or come to a decision about something.
Example :
We finally decided after lengthy deliberations.
Synonyms : determine, make up one's mind
Meaning : Bring to an end. Settle conclusively.
Example :
The case was decided.
The judge decided the case in favor of the plaintiff.
The father adjudicated when the sons were quarreling over their inheritance.
Synonyms : adjudicate, resolve, settle
Meaning : Cause to decide.
Example :
This new development finally decided me!.
Meaning : Influence or determine.
Example :
The vote in New Hampshire often decides the outcome of the Presidential election.