Too low a value or price assigned to something

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Undervaluation \Un`der*val`u*a"tion\, n. The act of undervaluing; a rate or value not equal to the real worth.

Wiktionary Word definitions in Wiktionary
n. 1 The act of undervaluing, of assigning too low a value to something. 2 A value that is inappropriately low.

WordNet Word definitions in WordNet
n. too low a value or price assigned to something