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Related to prime: prime time, Prime bank, Prime Suspect, Amazon Prime
a. having no factors except itself or one
b. having no common factors (with)
2. Maths short for prime number
b. the tonic of a scale
4. Chiefly RC Church the second of the seven canonical hours of the divine office, originally fixed for the first hour of the day, at sunrise
5. the first of eight basic positions from which a parry or attack can be made in fencing
Main or primary, as in prime contractor.
In blasting, to place a detonator in a cartridge or charge of explosive.
To treat wood with a primer or penetrant primer.
To add water to a pump to enable it to begin pumping.