IPA: /ˈniːtɪst/
KK: /nitɪst/
The most tidy or organized; very clean and orderly.
Her room is the neatest in the house, with everything in its place.
Comparative: neater
Superlative: neatest
Neatest → It is formed from "neat" (from Old English *neat*, meaning tidy or orderly) and the suffix "-est" (meaning the most). The word "neatest" means the most tidy or orderly.
Think of 'neat' as being tidy, and remember that 'neatest' means the most tidy.