All 6 Uses

positive
in
Hillbilly Elegy
(Edited)

But I began to put on weight, and I was positively chubby by the time I started the fifth grade.
p. 72.7 *

positively = absolutely (used for emphasis)
Religious institutions remain a positive force in people's lives, but in a part of the country slammed by the decline of manufacturing, joblessness, addiction, and broken homes, church attendance has fallen off.
p. 93.9

positive = good or beneficial
Reams of social science attest to the positive effect of a loving and stable home.
p. 149.8 *
She seemed some sort of genetic anomaly, a combination of every positive quality a human being should have: bright, hardworking, tall, and beautiful.
p. 209.3
Put two of me in the same home and you have a positively radioactive situation.
p. 230.8

positively = absolutely (used for emphasis)
Brian's mom's death was another shitty card in an already abysmal hand, but there are many cards left to deal: whether his community empowers him with a sense that he can control his own destiny or encourages him to take refuge in resentment at forces beyond his control; whether he can access a church that teaches him lessons of Christian love, family, and purpose; whether those people who do step up to positively influence Brian find emotional and spiritual support from their neighbors.
p. 255.4

positively = in a good or beneficial manner

Definitions:

(1) (positive as in: I'm absolutely positive!)
certain (having no doubt; or used for emphasis)
(2) (positive as in: had a positive effect)
good or beneficial
(3) (positive as in: positive feedback from my boss)
approval or agreement
(4) (positive as in: a positive attitude)
optimistic (expecting or focusing on good things); or agreeable
(5) (positive as in: The test came back positive.)
found a condition or substance to be present
indicating the presence of something being tested for -- especially a disease, condition, or substance
(6) (positive as in: a positive number)
greater than zero (of a number)
(7) (meaning too rare to warrant focus)
See a comprehensive dictionary for less common meanings of positive including some in the fields of electricity, physics, chemistry, medicine, philosophy, and grammar. Note that most all senses of positive indicate that something is good or present.