crys‧tal‧lize also crystallise British English
1 [intransitive and transitive]HC
if a liquid crystallizes, it forms crystals:
The liquid will crystallize at 50 degrees centigrade.
2 [intransitive and transitive]
if an idea, plan etc crystallizes or is crystallized, it becomes very clear in your mind:
Inside her a thought was crystallizing.
—crystallization noun [uncountable]