1.  overestimate(n = noun.communication) overappraisal, overestimation, overvaluation - an appraisal that is too high;
is a kind of appraisal, estimate, estimation
Derived forms verb overestimate₁, verb overestimate₂

2.  overestimate(n = noun.cognition) overestimation, overrating, overreckoning - a calculation that results in an estimate that is too high;
is a kind of approximation, estimate, estimation, idea
Derived form verb overestimate₂

1.  overestimate(v = verb.cognition) overrate - make too high an estimate of; "He overestimated his own powers"
is one way to misjudge
Antonym: underestimate
Derived forms noun overestimate₁, noun overestimation₂, noun overestimation₁
Sample sentences: Somebody ----s something; Somebody ----s somebody

2.  overestimate(v = verb.cognition) overvalue - assign too high a value to; "You are overestimating the value of your old car"
is one way to value
Antonym: underestimate
Derived forms noun overestimate₂, noun overestimate₁, noun overestimation₁
Sample sentences: Somebody ----s something

1.  To estimate too highly. [1913 Webster]

2.  To overvalue. [PJC]

   An estimate that is too high; as, an overestimate of the vote. [1913 Webster]

overestimate, v. & n.
--v.tr. (also absol.) form too high an estimate of (a person, ability, cost, etc.).
--n. too high an estimate.

Derivative:
overestimation n.

VB  flatter, praise to the skies, puff, wheedle, cajole, glaver, coax, fawn upon, faun upon, humor, gloze, soothe, pet, coquet, slaver, butter, jolly, bespatter, beslubber, beplaster, beslaver, lay it on thick, overpraise, earwig, cog, collogue, truckle to, pander to, pandar to, suck up to, kiss the ass of, pay court to, court, creep into the good graces of, curry favor with, hang on the sleeve of, fool to the top of one's bent, lick the dust, lay the flattering unction to one's soul, gild the pill, make things pleasant, overestimate, exaggerate.

VB  misjudge, misestimate, misthink, misconjecture, misconceive, fly in the face of facts, miscalculate, misreckon, miscompute, overestimate, underestimate, prejudge, forejudge, presuppose, presume, prejudicate, dogmatize, have a bias, have only one idea, jurare in verba magistri, run away with the notion, jump to a conclusion, rush to a conclusion, leap to a conclusion, judge hastily, shoot from the hip, jump to conclusions, look only at one side of the shield, view with jaundiced eye, view through distorting spectacles, not see beyond one's nose, dare pondus fumo, get the wrong sow by the ear, give a bias, give a twist, bias, warp, twist, prejudice, prepossess.

VB  overestimate, overrate, overvalue, overprize, overweigh, overreckon, overstrain, overpraise, eulogize, estimate too highly, attach too much importance to, make mountains of molehills, catch at straws, strain, magnify, exaggerate, set too high a value upon, think much of, make much of, think too much of, make too much of, outreckon, panegyrize, extol, extol to the skies, make the most of, make the best of, make the worst of, make two bites of a cherry, have too high an opinion of oneself.

VB  exaggerate, magnify, pile up, aggravate, amplify, overestimate, hyperbolize, overcharge, overstate, overdraw, overlay, overshoot the mark, overpraise, make over much, over the most of, strain, strain over a point, stretch, stretch a point, go great lengths, spin a long yarn, draw with a longbow, shoot with a longbow, deal in the marvelous, out-Herod Herod, run riot, talk at random, heighten, overcolor, color highly, color too highly, broder, flourish, color, puff.