1. to form into crystals or cause to form crystals
Usage: chemistry; physics
2. to become clear and definite in form or expression
Usage: figurative

Examples

• Salt will crystallise when the water evaporates.
• The sugar began to crystallise around the edges of the pan.
• Her ideas started to crystallise after the meeting.
• The plan crystallised into a concrete proposal.
• His thoughts crystallised as he wrote them down.
• The opposition’s strategy began to crystallise around key issues.