plus

American Heritage® Dictionary of the English Language, Fourth Edition

1. conj. Mathematics Increased by the addition of: Two plus two is four.
2. conj. Added to; along with: Their strength plus their spirit makes them formidable. Intelligence plus wit makes for an interesting person.
3. conj. Usage Problem And: "[He] is a committed man, plus he has imagination, vitality and national stature” ( Merv Griffin).
4. adj. Positive or on the positive part of a scale: a plus value; a temperature of plus five degrees.
5. adj. Added or extra: a plus benefit.
6. adj. Informal Increased to a further degree or number: "At 70 plus, [he] is old enough to be metaphysical” ( Anatole Broyard).
7. adj. Ranking on the higher end of a designated scale: a grade of C plus.
8. adj. Physics Positive.
9. n. Mathematics The plus sign (+).
10. n. A positive quantity.
11. n. A favorable condition or factor: The clear weather was a plus for the golf tournament.

Century Dictionary and Cyclopedia

1. More (by a certain amount); increased (by a specified addition): followed by a noun as an apparent object (a preposition, by, to be supplied): as, the interest plus the disbursements amounts to so much; 6 plus 9 is 15: in this and the next two uses correlative to minus. in algebra and arithmetic this sense is indicated by the sign +, called the plus sign or sign of addition: as, a + b = x, which is read “a plus b equals x.” [A sign like this was formerly sometimes used as a contraction of Latin et, and.
2. More than nothing; belonging to the positive side, as of an account; above zero, or above the lowest point of positive reckoning: as, a plus quantity in an equation (that is, one having the plus sign, or when initial having no sign, before it).
3. Marking more than zero; positive: as, the plus sign.
4. In etymology, in composition with; with the addition of (the word or element following): expressed, as in mathematics, by the sign + (see the etymologies in this work). The same sign is occasionally used to indicate cognate or related forms

Wiktionary

1. conj. sum of the previous one and the following one.
2. conj. colloquial with; having in addition
3. conj. and also; in addition
4. n. A positive quantity.
5. n. An asset or useful addition.
6. n. arithmetic A plus sign: +.
7. adj. Being positive rather than negative or zero.
8. adj. Positive, or involving advantage.
9. adj. physics Electrically positive.
10. v. informal To add; to subject to addition.

GNU Webster's 1913

1. adj. (Math.) More, required to be added; positive, as distinguished from negative; -- opposed to minus.
2. adj. Hence, in a literary sense, additional; real; actual.

WordNet 3.0

1. n. the arithmetic operation of summing; calculating the sum of two or more numbers
2. n. a useful or valuable quality
3. adj. involving advantage or good
4. adj. on the positive side or higher end of a scale