Bond  —n. 1 thing or force that unites or (usu. In pl.) Restrains. 2 binding agreement. 3 commerce certificate issued by a government or a company promising to repay borrowed money at a fixed rate of interest. 4 adhesiveness. 5 law deed binding a person to make payment to another. 6 chem. Linkage between atoms in a molecule. —v. 1 hold or tie together. 2 connect or reinforce with a bond. 3 place (goods) in bond.