Insolvency \In*sol"ven*cy\, n.; pl. {Insolvencies}. (Law) (a) The condition of being insolvent; the state or condition of a person who is insolvent; the condition of one who is unable to pay his debts as they fall due, or in the usual course of trade and business; as, a merchant's insolvency. (b) Insufficiency to discharge all debts of the owner; as, the insolvency of an estate. {Act of insolvency}. See {Insolvent law} under {Insolvent}, a.