Also found in: Thesaurus, Legal, Financial.
tr.v. un·der·sold (-sōld′), un·der·sell·ing, un·der·sells
1. To present (an idea, for example) with little or insufficient enthusiasm: Now that our proposal has failed, it's obvious that we undersold it.
2. To sell at a lower price than (a competitor); undercut.
3. To sell (something) at a price lower than the real, normal, or appropriate value.