Added 9 October 2026 underestimate /ʌndɚˈɛs.tɪ.meɪt/ noun Categories: Mind & IdeasRare Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about underestimate at Wordnik → Where our words come from → An estimation that is too low; an estimate that is less than the true or actual value. verb Assign too low a value to. Don't underestimate the value of this heirloom-you may sell it at a good price Make a deliberately low estimate. The construction company wanted the contract badly and lowballed Make too low an estimate of. he underestimated the work that went into the renovation Related Words: underrateundervaluelowballunderratingunderreckoningundervaluationundervaluingunderstateunderplayunderdogdisregardignore Back to today's word