Having or displaying half the mental capacity of a half-wit.

(Britain) Each of the four days customarily regarded as starting a new quarter year, on which rents etc are often due.

(astronomy) The waxing lunar phase, from new moon to half way between new moon and full moon.

the waning lunar phase halfway between full moon and new moon.

Each of the four days customarily regarded as starting a new quarter year, formerly established as a time for rents and other payments to be due, tenancies to begin and end, and various meetings and assemblies to be held.

(astronomy) Either of the intermediate stages between the new and full moons.

of three fourths of the usual dimension / (of a portrait) with the subject turned slightly away from a frontal view

(rugby) A player positioned between the half-backs and the full-backs (properly a three-quarter back) / (only in singular) A fraction with three of four equal parts (=75 %)

(Canada, US, music) A musical note one beat long in 4/4 time.

A period of twenty-five years.