1 [only before noun]
used to talk about an advantage or good feature of a thing or situation [≠ minus]:
Another of the Beach Club's plus points is that it's right in the middle of town.
This is not an exciting car to drive, but on the plus side it is extremely reliable.
used after a number to mean an amount which is more than that number:
an income of $50,000 plus
Most children start school when they're five plus.
more than zero - used especially when talking about temperatures [≠ minus]:
Daytime temperatures barely reached plus 5º.
a mark used in a system of judging students' work. An 'A plus' is slightly higher than an 'A'.