I. ˈek-strə adjective
Etymology: probably short for extraordinary
Date: 1757
1.
a. : more than is due, usual, or necessary : additional
extra work
b. : subject to an additional charge
dessert is extra
2. : superior
extra quality
II. noun
Date: 1793
1. : one that is extra or additional: as
a. : a special edition of a newspaper
b. : an added charge
c. : an additional worker ; specifically : one hired to act in a group scene in a motion picture or stage production
d. : an attractive addition or accessory : frill
cars loaded with extra s
2. : something of superior quality or grade
III. adverb
Date: 1807
: beyond the usual size, extent, or degree
extra large