What is a extra?

Answer:
The term 'extra' has multiple distinct meanings: 1: further or added; 2: added to a regular schedule; 3: something additional of the same kind; 4: a minor actor in crowd scenes; 5: unusually or exceptionally; 6: an additional edition of a newspaper (usually to report a crisis); 7: more than is needed, desired, or required
Source: True Knowledge
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