If you're confident your favorite team will win the championship even though the star player is injured, you may want to reconsider: don't let your team spirit cause you to overestimate, or overvalue, the team's abilities.

When you estimate something, you make a calculation or a judgment of its value. So, when you overestimate, you assign too much value to the thing you are judging. If you overestimate how much time you have left to get to school, you could be late. Likewise, if you overestimate how prepared you are for a test, you might end up with a poor grade. This verb is the opposite of underestimate, or “to assign too little value.”

Definitions of overestimate

v make too high an estimate of

“He overestimated his own powers”
underestimate, underrate
make too low an estimate of
overcapitalise, overcapitalize
overestimate the market value of
Type of:
judge incorrectly

v assign too high a value to

“You are overestimating the value of your old car”
underestimate, undervalue
assign too low a value to
Type of:
fix or determine the value of; assign a value to

n an appraisal that is too high

overappraisal, overestimation, overvaluation
Type of:
appraisal, estimate, estimation
a document appraising the value of something (as for insurance or taxation)

n a calculation that results in an estimate that is too high

overestimation, overrating, overreckoning
Type of:
approximation, estimate, estimation, idea
an approximate calculation of quantity or degree or worth

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.