coastline

play
noun coast·line \-ˌlīn\

Definition of coastline

  1. 1 :  a line that forms the boundary between the land and the ocean or a lake

  2. 2 :  the outline of a coast

Examples of coastline in a sentence

  1. The plane flew along the eastern coastline.

1856

First Known Use of coastline

1856


COASTLINE Defined for English Language Learners

coastline

play
noun coast·line \-ˌlīn\

Definition of coastline for English Language Learners

  • : the land along the edge of a coast



Seen and Heard

What made you want to look up coastline? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

acid in temper, mood, or tone

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • peter-bruegel-tower-of-babel-painting
  • What language does pajama come from?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Syn City

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!