Alternative form of premenstrual syndrome

(US) A medical condition that started before a person's health insurance went into effect.

preestablished harmony

(electronics) A technique utilized to increase linearity or compensate for nonlinearity in power amplifiers.

plural of digital pre-distortion

(law) In the law governing charitable trusts, the doctrine that a court may direct the funds of the trust to a best alternative, to be chosen when the original beneficiary is no longer a choice.

Alternative spelling of cy pres

The head of state of a republic. / In presidential republics, the head of government and head of state.

(archaic) Occupying the first rank or chief place; having the highest authority; presiding.

To act as president; to do presidential duties.