The Oxford Thesaurus An A-Z Dictionary of Synonyms - debtn.

1) obligation; due, indebtedness, liability, responsibility, accountability, encumbrance: He owes a debt of gratitude to his wife for her moral support. The company takes care of all debts promptly. 2) in debt. under obligation, owing, accountable, beholden, indebted, responsible, answerable for, liable, encumbered, in arrears, straitened, in dire straits, in (financial) difficulty or difficulties, in the red, Colloq US and Canadian in hock: I shall always be in debt to you for your help. The London branch is in debt for ten million pounds.