Englishfor English speakers
prior
Preposition
—
If something happens prior to something else, it happens before it.
In this recipe, most of the work is actually done prior to cooking.
Prior to 1917 most people had lived on private farms.
prior
Adjective
—
occurring before
We learned that police had had prior knowledge of the attack.
Few of these workers have any substantial prior experience in industry.
estimate
Noun
—
An estimate is a judgement of a size, value, amount, cost, etc., which is based on incomplete information.
British Telecom will give you an estimate of the cost before doing any work.
estimate
Verb
—
If you estimate the number, size, value, amount, cost, etc. of something, you guess based on incomplete information.
It's difficult to estimate how long it will take to get to London because we don't know how bad the traffic will be.