a judgement that you make without having the exact details or figures about the size, amount, cost, etc. of something

​to form an idea of the cost, size, value, etc. of something, but without calculating it exactly. estimate something to estimate the cost/value/number of ...

to form an idea of the cost, size, value, etc. of something, but without calculating it exactly estimate something (at something) Police estimate the crowd ...

a judgment that you make without having the exact details or figures about the size, amount, cost, etc. of something

There are five meanings listed in OED's entry for the verb estimate, three of which are labelled obsolete. See 'Meaning & use' for definitions, usage, and ...

​[singular] a judgement or opinion about the value or quality of somebody/something. Who is the best candidate in your estimation?

a judgment or an opinion about the value or quality of someone or something. Who is the best candidate in your estimation?

A measurement or a statement about the value of some quantity is said to be an estimate if it is known, believed, or suspected to incorporate some degree of ...

to guess or calculate the cost, size, value, etc. of something: Government sources estimate a long-term 50 percent increase in rail fares.

(in the sense 'able to be estimated or appraised'; earlier in inestimable): via Old French from Latin aestimabilis, from aestimare 'to estimate'.