1. Comparative of much; to a greater degree or extent
2. Used to form the comparative of some adjectives and adverbs; SYN. to a greater extent.

1. Increased by; with the addition of
2. Besides — used chiefly in speech and casual writing

(Irregular plural: pluses).
1. Plus sign.
2. An added quantity.
3. A positive factor or quality.
4. Surplus.