noun ·2 syllables ·Uncommon ·Advanced level

Definitions

Noun

1. 1
   The shape, outline, or boundary of a coast. (The term coastline is generally used to describe the approximate boundaries at relatively large spatial scales.) countable, uncountable

   "The sweep of the rocky Southern California coastline off Point Fermin."

2. 2
   the outline of a coast wordnet

Synonyms

All synonyms

bankbeachbeachfrontbermcoastcoastland

Example

More examples

"The sea indented the coastline."

Etymology

From coast + line.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.