Extra \Ex"tra\, n.

1. Something in addition to what is due, expected, or customary; esp., an added charge or fee, or something for which an additional charge is made.

2. An edition of a newspaper issued at a time other than the regular one.

3. (Cricket) A run, as from a bye, credited to the general score but not made from a hit.

4. Something of an extra quality or grade.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Extra \Ex"tra\, n.; pl. Extras. Something in addition to what is due, expected, or customary; something in addition to the regular charge or compensation, or for which an additional charge is made; as, at European hotels lights are extras. [Colloq.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Extra- \Ex"tra-\ [L., fr. exter. See Exterior.]

A Latin preposition, denoting beyond, outside of; -- often used in composition as a prefix signifying outside of, beyond, besides, or in addition to what is denoted by the word to which it is prefixed.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Extra \Ex"tra\, a. Beyond what is due, usual, expected, or necessary; additional; supernumerary; also, extraordinarily good; superior; as, extra work; extra pay. ``By working extra hours.'' --H. Spencer.

Source: Webster's Revised Unabridged Dictionary (1913)