All 8 Uses

positive
in
The Last Lecture
(Edited)

I watched Dr. Wolff use semantics to phrase whatever he could in a positive light. When we asked, “How long before I die?” he answered, “You probably have three to six months of good health.”
Part 3

positive = optimistic (focusing on good things)
It has not always been easy to stay positive through my cancer treatment.
Part 3
Though Jai wasn't thrilled with my bluntness and my know-it-all attitude, she said I was the most positive, upbeat person she'd ever met.
Part 3

positive = optimistic
We recognized that there were things we could do that might help the outcome in positive ways…and we did them.
Part 3 *

positive = good or beneficial
But on the positive side, I was able to reassure people: "If I haven't said anything, you have nothing to worry about."
Part 5
It pains him to see patients who are having a tough day healthwise and assume it's because they weren't positive enough.
Part 5 *

positive = optimistic (focusing on good things)
And Dr. Reiss, the counselor Jai and I see, has helped me find strategies to avoid losing myself in the stress of my periodic cancer scans, so I'm able to focus on my family with an open heart, a positive outlook and almost of all my attention.
Part 5
He's just this phenomenal ball of positive energy; completely physical and gregarious.
Part 6

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.