Sum″mit (?), n. [F. sommet, dim. of OF. som, sum, top, from L. summum, from summus highest. See Sum, n.] 1. The top; the highest point.
Fixed on the summit of the highest mount. Shak.
2. The highest degree; the utmost elevation; the acme; as, the summit of human fame.
3. (Zoöl.) The most elevated part of a bivalve shell, or the part in which the hinge is situated.
Summit level, the highest level of a canal, a railroad, or the like, in surmounting an ascent.