1. the action of making or becoming wider, larger, or more open
Usage: medical; technical
2. enlarged or widened parts or areas, especially in body structures
Usage: medical; anatomy

Examples

• The doctor observed several dilatations in the patient’s blood vessels.
• Cardiac dilatations can indicate underlying heart problems.
• The radiologist noted abnormal dilatations in the kidney structures.
• Heat causes dilatations in metal pipes and joints.
• The eye exam revealed dilatations of the pupils.
• Vascular dilatations were visible on the medical scan.