IPA: /ˈdɪmɪst/
KK: /dɪmɪst/
The least bright or having the lowest level of light.
In the dimmest corner of the room, I could barely see anything.
Comparative: dimmer
Superlative: dimmest
Dimmest → It is formed from "dim" (from Old English "dimm", meaning not bright or obscure) and the suffix "-est" (used to form the superlative degree). The word "dimmest" means the least bright or the most obscure.
Think of something that is the "least bright" or most obscure, as indicated by the Old English root "dimm" meaning not bright.