How do you pronounce "coastline"?

In American English: /ˈkoʊstˌlaɪn/ (KOHST-leyen). In British English: /kˈəʊstlaɪn/ (K-ohstl). In Canadian English: /ˈkoʊstˌlaɪn/ (KOHST-leyen). In Australian English: /kˈəʊstlaɪn/ (K-ohstl).

Is "coastline" pronounced differently in American and British English?

Yes. In American English it's pronounced /ˈkoʊstˌlaɪn/ (KOHST-leyen), while in British English it's /kˈəʊstlaɪn/ (K-ohstl).

How to Pronounce "coastline"

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coastline

regional

/ˈkoʊstˌlaɪn/

KOHST-leyen

Syllable Breakdown

koʊstcoast·laɪnline

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14