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prime1 British & World English

Of first importance; main

prime2 British & World English

Make (something) ready for use or action, in particular:

prime rib British & World English

A roast or steak cut from the seven ribs immediately before the loin

sub-prime British & World English

Denoting or relating to credit or loan arrangements for borrowers with a poor credit history, typically having unfavourable conditions such as high interest rates

prime cost British & World English

The direct cost of a commodity in terms of the materials and labour involved in its production, excluding fixed costs

prime lens British & World English

A lens of fixed focal length

prime mover British & World English

A person who is chiefly responsible for the creation or execution of a plan

prime rate British & World English

The lowest rate of interest at which money may be borrowed commercially

prime time British & World English

The time at which a radio or television audience is expected to be at its highest

prime contract British & World English

A contract whose requirements are partly fulfilled by the awarding of subcontracts

prime meridian British & World English

A planet’s meridian adopted as the zero of longitude

prime minister British & World English

The head of an elected government; the principal minister of a sovereign or state

prime vertical British & World English

A great circle in the celestial sphere passing through the zenith and the east and west points of the horizon

prime the pump in prime2 British & World English

Stimulate the growth or success of something by supplying it with money

prime the pump British & World English

Stimulate the growth or success of something by supplying it with money

cut someone off in their prime in cut British & World English

Bring someone’s life or career to an abrupt end while they are at the peak of their abilities

cut someone off in their prime British & World English

Bring someone’s life or career to an abrupt end while they are at the peak of their abilities

Mersenne number British & World English

A number of the form 2p−1, where p is a prime number. Such a number which is itself prime is also called a Mersenne prime