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1. Having become fixed and definite in form
   "distinguish between crystallised and uncrystallized opinion"
   - crystallized
    
2. Having both internal structure and external form of a crystal
   "quartz crystal is perfectly crystallised"
   - crystallized, crystalised [Brit]

1. Make free from confusion or ambiguity; make clear
   - clear, clear up, shed light on, crystallize, crystalize, crystalise [Brit], straighten out, sort out, enlighten, illuminate, elucidate
    
2. Cause to form crystals or assume crystalline form
   "crystallise minerals"
   - crystallize, crystalize, crystalise [Brit]
    
3. Cause to take on a definite and clear shape
   "He tried to crystallise his thoughts"
   - crystallize, crystalise [Brit], crystalize
    
4. Assume crystalline form; become crystallized
   - crystallize, crystalize, crystalise [Brit], effloresce

See also: crystalline, crystallisation [Brit]

Type of: change integrity, clarify, clear up, elucidate, form, shape, solidify