extra

1 extra /ˈɛkstrə/ adjective
1 extra
/ˈɛkstrə/
adjective
Britannica Dictionary definition of EXTRA
1 
always used before a noun : more than is usual or necessary : additional
2 
: costing more : requiring additional payment

go the extra mile

— see mile
2 extra /ˈɛkstrə/ adverb
2 extra
/ˈɛkstrə/
adverb
Britannica Dictionary definition of EXTRA
1 
: beyond the usual size or amount
2 
somewhat informal : very or unusually
3 extra /ˈɛkstrə/ noun
plural extras
3 extra
/ˈɛkstrə/
noun
plural extras
Britannica Dictionary definition of EXTRA
[count]
1 
: something that is added especially to make a product, service, etc., more appealing
2 
: a person hired to act in a group scene in a movie