hottest
adj.adj. having the highest temperature compared to everything else. It can also describe something that is very popular or exciting right now.
adj. the superlative form of hot, indicating the maximum degree of thermal energy or, figuratively, the peak of current popularity and trendiness.
July is usually the hottest month of the year.
The tech company just released its hottest new gadget, and thousands of people are already waiting in line.
Climatologists confirmed that the previous decade was the hottest on record, prompting urgent discussions regarding global carbon emission targets and renewable energy transitions.
Superlative form of the adjective 'hot'; requires the definite article 'the' when used before a noun.
the most hottest daythe hottest dayShort adjectives like 'hot' form the superlative by adding '-est'; using 'most' as well is a double superlative error.