The Collaborative International Dictionary of English v.0.48:

overdue \o"ver*due"\, a.
   Due and more than due; delayed beyond the proper time of
   arrival, payment, return, etc.; as, an overdue vessel; an
   overdue note; a book overdue at the library; an overdue
   payment.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

overdue
    adj 1: past due; not paid at the scheduled time; "an overdue
           installment"; "a delinquent account" [syn: delinquent,
           overdue]

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "overdue":
   ahead of time, anachronistic, antedated, anticipated, arrested,
   awaited, back, backward, beforehand, behind, behind time,
   behindhand, belated, blocked, dated, delayed, delayed-action,
   detained, due, early, expected, foredated, foreseen, held up,
   hoped-for, hung up, imminent, in a bind, in abeyance, in prospect,
   in view, jammed, late, latish, long-expected, mature,
   metachronistic, misdated, mistimed, moratory, never on time,
   obstructed, on the horizon, out of date, out of season,
   outstanding, owing, parachronistic, past due, payable, postdated,
   presumed, probable, prochronistic, promised, prospective, retarded,
   slow, stopped, tardy, unpunctual, unready, unseasonable, unsettled,
   untimely



Bouvier's Law Dictionary, Revised 6th Ed (1856):

OVERDUE. A bill, note, bond or other contract, for the payment of money at a
particular day, when not paid upon the day, is overdue.
     2. The indorsement of a note or bill overdue, is equivalent to drawing
a new bill payable at sight. 2 Conn. 419; 18 Pick. 260; 9 Alab. R. 153.
     3. A note when passed or assigned when overdue, is subject to all the
equities between the original contracting parties. 6 Conn. 5; 10 Conn. 30,
55; 3 Har. (N. J.) Rep. 222.