promise of reimbursement in the case of loss; paid to people or companies so concerned about hazards that they have made prepayments to an insurance company
place in a place where something cannot be removed or someone cannot escape; "The parents locked her daughter up for the weekend"; "She locked her jewels in the safe"
close with or as if with a tight seal; "This vacuum pack locks in the flavor!"
an impenetrable barrier to communication or information especially as imposed by rigid censorship and secrecy; used by Winston Churchill in 1946 to describe the demarcation between democratic and communist countries
certainty based on past experience; "he wrote the paper with considerable reliance on the work of other scientists"; "he put more trust in his own two legs than in the gun"