Meaning of QUAD in English

I. ˈkwäd noun

Date: 1820

: quadrangle

II. noun

Etymology: short for quadrat

Date: circa 1879

: a type-metal space that is one en or more in width

III. transitive verb

( quad·ded ; quad·ding )

Date: circa 1888

: to fill out (as a typeset line) with blank space

IV. noun

Date: 1896

1. : quadruplet

2. : a ski lift that accommodates four people

V. adjective

Date: 1970

: quadraphonic

VI. noun

Date: 1971

: quadraphonic sound

VII. noun

Etymology: short for quadrillion

Date: 1974

: a unit of energy equal to one quadrillion British thermal units

VIII. noun

Date: 1954

: quadriceps — usually used in plural

Merriam-Webster's Collegiate English vocabulary.      Энциклопедический словарь английского языка Merriam Webster.