Of fifth rank or order. / Consisting of five things; arranged in fives. / (arithmetic) To the base of five; represented by the numerals 0, 1, 2, 3 and 4.

(astrology) Any of 72 rays associated with the Sun, six for each of the 12 houses of the Zodiac.

plural of quinary

(economics) The branch of a country's economy where high-level decisions are made by top-level executives in government, industry, education, etc.

plural of quinary sector