Definitions

1. adjective

having the highest degree of positivity; most optimistic or enthusiastic

“The festival’s organizers aimed to make it the positivest event of the year, filled with joy and excitement.”

2. superlative form of adjective ‘positive’

comparative form of ‘positive’ is ‘more positive’, the superlative form is used to compare three or more nouns

“She is the positivest person in the room, always spreading happiness and good vibes.”