c.1400, "boundary, frontier," from Old French limite "a boundary," from Latin limitem (nominative limes) "a boundary, limit, border, embankment between fields," related to limen "threshold." Originally of territory; general sense from early 15c. Colloquial sense of "the very extreme, the greatest degree imaginable" is from 1904.
limit lim·it (lĭm'ĭt)
n.
The point, edge, or line beyond which something cannot or may not proceed.
A confining or restricting object, agent, or influence.
The greatest or least amount, number, or extent allowed or possible.
To confine or restrict within a boundary or bounds.
To fix definitely; to specify.