Definition of frigates:
(n) :
A modern type of warship, equivalent in size or smaller than a destroyer, often focused on anti-submarine warfare, but sometimes general purpose.
(n) :
(nautical) Any of several types of warship:
(n) :
(historical) An escort warship, smaller than a destroyer, introduced in World War 2 as an anti-submarine vessel.
(n) :
(fiction) A warship or space warship, inspired by one of the many historic varieties of frigate.
(n) :
(historical) A sailing warship (of any size) built for speed and maneuverability; typically without raised upperworks, having a flush forecastle and tumblehome sides.
(n) :
(historical) A sailing warship with a single continuous gun deck, typically used for patrolling and blockading duties, but not considered large enough for the line of battle.