adjective.
Being late or slow, especially in paying a debt.
The Century Dictionary and Cyclopedia
In the rear; in a backward state; not sufficiently advanced; not equally advanced with some other person or thing: as, behindhand in studies or work.
Late; delayed beyond the proper time; behind the time set or expected.
In a state in which expenditure has gone beyond income; in a state in which means are not adequate to the supply of wants; in arrear: as, to be behindhand in one's circumstances; you are behindhand with your payments.
Underhand; secret; clandestine.
the GNU version of the Collaborative International Dictionary of English
adverb.
In arrears financially; in a state where expenditures have exceeded the receipt of funds.
adverb.
In a state of backwardness, in respect to what is seasonable or appropriate, or as to what should have been accomplished; not equally forward with some other person or thing; dilatory; backward; late; tardy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adverb.
in debt
adjective.
behind schedule
Word Usage
"These bare questions at once satisfied and silenced the greater number; some, however (like a few in England who are a century behindhand), thought that all such inquiries were useless and impious; and that it was quite sufficient that God had thus made the mountains."