What is the meaning of crystallised?

verb

• Make free from confusion or ambiguity; make clear.
  • usage: "Could you clarify these remarks"; "Clear up the question of who is at fault"
  • synonyms: clear, clear up, shed light on, crystallize, crystallise, crystalize, crystalise, straighten out, sort out, enlighten, illuminate, elucidate
• Cause to form crystals or assume crystalline form.
  • usage: "crystallize minerals"
  • synonyms: crystallize, crystallise, crystalize, crystalise
• Cause to take on a definite and clear shape.
  • usage: "He tried to crystallize his thoughts"
  • synonyms: crystallize, crystallise, crystalise, crystalize

adjective

• Having become fixed and definite in form."distinguish between crystallized and uncrystallized opinion- Psychological Abstracts
  • synonyms: crystallized