All 7 Uses

negative
in
An Abundance of Katherines
(Edited)

He sketched: Where x = time, and y = happiness, y = 0 beginning of relationship and breakup. y negative = breakup by m. and y positive = breakup by f: my relationship with K-19.
p. 41.9 *

negative = with a value less than zero
Assuming negative numbers if the guy is more of a Dumpee; positive if the girl is.
p. 60.2

negative = with a value of less than zero
Which Colin arrived at by calculating the popularity difference between Person A and Person B on a scale of 1 to 1,000 (you can approximate) and then dividing by 75—positive numbers if the girl is more popular; negative if the guy is.
p. 123.4
Positive numbers if the boy is more attracted to the girl; negative if vice versa.
p. 123.5
A negative number if the boy is more of a Dumper; positive number if the girl is.
p. 123.5
Positive numbers it the girl is more outgoing; negative if the guy is.
p. 123.7
…both the water and the rocks ended up worse off in the bargain, and then when she dumped me in the same coffee shop where we'd met three months before, she said she was the water and I was the rocks and we were just going to keep going at each other till there was nothing left of either of us—and when I pointed out that, really, water doesn't suffer any negative effects whatsoever from slowly eroding the rocks on the lakeshore, she allowed as to how that was true but dumped me anyway.
p. 206.2 *

negative = bad or harmful

Definitions:

(1) (negative as in: had a negative effect)
bad or harmful
(2) (negative as in: negative feedback from customers)
to express criticism or disagreement, or (especially when talking over a radio or in a military setting) to say "no"
(3) (negative as in: a negative attitude)
pessimistic (emphasizing bad things) or disagreeable
(4) (negative as in: The test came back negative.)
did not find a condition or substance to be present
(5) (negative as in: a negative number)
less than zero
(6) (meaning too rare to warrant focus)
See a comprehensive dictionary for less common meanings of negative including some in the fields of electricity, physics, chemistry, medicine, photography, and grammar. Note that most non-technical senses of negative indicate that something is bad or lacking.