(mathematical analysis, especially nonstandard analysis) An ultrafilter which contains all cofinite subsets of the set which is being "filtered" by it.

(US, historical) One of the antislavery settlers in Kansas Territory in the 1850s. / (Ireland, historical) One of those in Ireland who supported the Anglo-Irish Treaty.

plural of Free-Stater

Halfway or partially free.

Alternative form of freesheet

Free of all ice, not covered in ice.

a school period in which a student has free time, i.e., is not enrolled in a class.

Not requiring any maintenance.

(computer hardware, of a personal computer) Lacking certain older components such as a floppy disk drive, legacy ports, and ISA or other expansion bus.

(law, historical) A married woman's entitlement to the use of her husband's lands or property after he dies; or the land and property itself considered as such an entitlement.