The meaning of UNDERESTIMATE is to estimate as being less than the actual size, quantity, or number. How to use underestimate in a sentence.

To underestimate is to guess that something is worth less or is smaller than it really is. You might underestimate the size of a one-pound hamburger until you realize it's too big to fit in your stomach. …

They've seriously underestimated the cost of the building project. The influence of the media should never be underestimated. She had a tendency to underestimate her son's potential. It seems that …

to think or guess that the amount, cost or size of something is smaller than it really is. We underestimated the time it would take to get there. The statistics seriously underestimate the …

If you underestimate something, you do not realize how large it is or will be. They underestimated how much work they needed to do.

1. To make too low an estimate of the quantity, degree, or worth of: Don't underestimate the difficulties involved in the project. 2. To consider (someone) to be less capable or effective than is actually the …

Underestimate definition: To make too low an estimate of the quantity, degree, or worth of.

To underestimate is to guess that something is worth less or is smaller than it really is. You might underestimate the size of a one-pound hamburger until you realize it's too big to fit in your stomach.

Jan 19, 2026 · underestimate (plural underestimates) An estimate that is too low.

to estimate at too low a value, rate, or the like: to underestimate the costs; to underestimate an employee. an estimate that is too low. un•der•es•ti•ma•tion /ˌʌndərˌɛstəˈmeɪʃən/ n. [countable] an …