positive - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “positive”

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positive

adjective  us   /ˈpɑz·ə·t̬ɪv/

positive adjective (CERTAIN)

without any doubt; certain: I’m absolutely positive that he’s the man I saw.

positive adjective (HAPPY)

happy or hopeful, or giving cause for happiness or hope: It’s important to have a positive attitude when you have a serious illness.

positive adjective (MEDICAL TEST)

[not gradable] (of a medical test) showing that the disease or condition for which the person is being tested does exist: Her TB test was positive.

positive adjective (COMPLETE)

[not gradable] (used to add force to an expression) complete: She was a positive joy to have around.

positive adjective (MORE THAN ZERO)

algebra [not gradable] (of a number or amount) more than zero: Two is a positive number.

positive adjective (ELECTRICITY)

physics [not gradable] of the type of electrical charge that a proton has
(Definition of positive from the Cambridge Academic Content Dictionary © Cambridge University Press)
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