This week's Word of the Week is, "Estimate." verb (used with object), estimated, estimating. to form an approximate judgment or opinion regarding the worth,amount, size, weight, etc., of; calculate approximately: to estimate the cost of a college education. to form an opinion of; judge. verb (used without object), estimated, estimating. to make an estimate. noun an approximate judgment or calculation, as of the value, amount, time,size, or weight of something. a judgment or opinion, as of the qualities of a person or thing. statement of the approximate charge for work to be done, submitted by a person or business firm ready to undertake the work.