IPA: /dɪˈfaɪnəbli/
KK: /dɪˈfaɪnəbli/
In a way that can be clearly identified or defined.
The results of the experiment were definably different from the previous ones.
Definably is formed from "define" (from Latin "definire", meaning to limit or determine) and "-ably" (meaning in a manner that can be). The word "definably" means in a manner that can be defined or determined.
Think of the word 'define' which means to limit or determine something, and remember that 'definably' means it can be defined.