v.
1.after a calculation, investigation, experiment, survey, or study
2.be careful or certain to do something
3.find out, learn, or determine with certainty, usually by making an inquiry or other effort
4.learn or discover with certainty
Idiom of the Day
let (someone) have it
to hit someone hard, to scold someone angrily
One man let another man have it when they had a fight on the bus.