"plus" as noun
1 - A positive quantity.
2 - An asset or useful addition.
3 - A plus sign: +.
"plus" as verb
1 - To add; to subject to addition.
2 - (often followed by 'up') To increase in magnitude.
3 - To improve.
"plus" as adjective
1 - Being positive rather than negative or zero.
2 - Positive, or involving advantage.
3 - Electrically positive.
"plus" as preposition
1 - And; sum of the previous one and the following one.
2 - With; having in addition.
3 - And also; in addition; besides (which).
