Definitive and Most significant

Definitive adjective - Being the most accurate and apparently thorough.

Most significant and definitive are semantically related. in authoritative topic. In some cases you can use "Most significant" instead an adjective "Definitive".

Nearby Words: definite, definitely, definition, definitively, definitional

Definitive and most significant are semantically related. Sometimes you can replace term "Definitive" with "Most significant", this terms are similar.