A cliffed coast, also called an abrasion coast, is a form of coast where the action of marine waves has formed steep cliffs that may or may not be precipitous. It contrasts with a flat or alluvial coast.

Seacliff can refer to:

• Seacliff, a beach, estate and harbour near North Berwick, Scotland.
• Seacliff, New Zealand, settlement in Otago, New Zealand
  • Seacliff Lunatic Asylum, a mental hospital near the settlement
• Seacliff, South Australia, suburb of Adelaide
• Seacliff Park, South Australia, a suburb of Adelaide
• Seacliff, California, a census-designated place near Aptos, California
• Seacliff State Beach, a California State Beach in Aptos, California