verb, -wrote, -writ⋅ten, -writ⋅ing.| 1. | to write under or at the foot of, esp. under other written matter. |
| 2. | to sign one's name, as to a document. |
| 3. | to show agreement with or to support by or as if by signing one's name to, as a statement or decision. |
| 4. | to bind oneself to contribute a sum of money to (an undertaking): Wealthy music lovers underwrote the experimental concerts. |
| 5. | to guarantee the sale of (a security issue to be offered to the public for subscription). |
| 6. | Insurance.
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| 7. | to underwrite something. |
| 8. | to carry on the business of an underwriter. |
underwrite