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