Definition of backcast:
(v) :
To identify the actions required in order to reach a proposed future.
(n) :
A cast or throw back.
(n) :
A backward stroke, or a stroke driving one back.
(n) :
(figuratively) Any discouragement or cause of relapse or failure.
(n) :
(UK dialectal) Misfortune; reverse; reversal; a relapse in health or illness; moral backsliding.
(v) :
(UK dialectal) To change retrospectively; reverse.