(archaic) third-person singular simple present indicative form of ally

(logic, mathematics) Is equivalent to; implies and is implied by; is true and false in the same cases as. / (by extension, informal) If, with added intensity

A surname.

Any of several related species of South American plants of the family Bromeliaceae, among them Bromelia serra, Bromelia hieronymi, Deinacanthon urbanianum and Pseudananas sagenarius.