(n): an obligation to pay money to another party
(n): money or goods or services owed by one person to another
(n): anything that is owed to someone else
(n): an obligation to pay or do something
(n): a legal agreement specifying a payment or action and the penalty for failure to comply
I like the last line as well. :-)
'First person: "Lovely weather we're having."
Second person: "We'll pay for it later."'
—Margaret Atwood, "Commentary: Our romance with debt—we'll pay for it later," seen here.