n.
1.something clearly established
2.property that your creditor can claim in case you default on your obligation
3.a prisoner who is held by one party to insure that another party will meet specified terms
4.one who provides a warrant or guarantee to another
5.a guarantee that an obligation will be met
Idiom of the Day
beg to differ with (someone)
to politely disagree with someone
"I'm sorry, but I beg to differ with you about what happened."