All 5 Uses of

positive
in
Life of Pi

As for the lion cubs, they would positively keel over with fright if they knew their mother was a dog, for that would mean they were motherless, the absolute worst condition imaginable for any young, warm-blooded life.
Chpt 29-32

positively = absolutely (used for emphasis)

Ten thousand trumpets and twenty thousand drums could not have made as much noise as that bolt of lightning; it was positively deafening.
Chpt 85-88 *

I assigned this tension to the new environment of the island; any change, even positive, will make an animal tense.
Chpt 89-92 *

positive = good or beneficial

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)
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.