- overspend⇄noun overspender.
- overspend⇄overspend, verb, -spent,-spending.
- overspend⇄v.i. to spend more than one can afford.
- overspend⇄v.t. 1. to spend more than (a specified amount).
2. to spend more than is necessary.
3. (Archaic.) to wear out; exhaust.