1.the act of closing something
2.the last section of a communication;
in conclusion I want to say...
3.approaching a particular destination; a coming closer; a narrowing of a gap;
the ship's rapid rate of closing gave them little time to avoid a collision
4.termination of operations;
they regretted the closure of the day care center
5.a concluding action
6.final or ending;
the closing stages of the election