(botany) Any plant of the genus Primula; the primroses.

The reference line at 0° longitude, passing through Greenwich, England, from which longitude east and west is measured.

(focus) Of a primary or central nature, first and foremost

Being the first in time or in history. / Of greatest importance; primary.

A primal cut (of meat).

(intransitive) To take part in primal therapy.

(psychology) A consequence, such as food or water, that fulfills a primary, unlearned drive, such as hunger or thirst, and thereby reinforces a behavior without dependence on prior learning.

(number theory) A factor of a given integer which is also a prime number.

(transitive) to reduce an integer to its set of prime factors.

most important