verb, -spent, -spend⋅ing.| 1. | to spend more than one can afford: Receiving a small inheritance, she began to overspend alarmingly. |
| 2. | to spend in excess of: He was overspending his yearly salary by several thousand dollars. |
| 3. | to spend beyond one's means (used reflexively): When the bills arrived, he realized he had foolishly overspent himself. |
| 4. | to wear out; exhaust. |