not solvent; not having sufficient estate to pay one's debts; unable to pay one's debts as they fall due, in the ordinary course of trade and business; as, in insolvent debtor.-not sufficient to pay all the debts of the owner; as, an insolvent estate.-relating to persons unable to pay their debts.-one who is insolvent; as insolvent debtor; -- in england, before 1861, especially applied to persons not traders.