shoreline
n. countable B1 Intermediate US //ˈʃɔɹˌɫaɪn// UK //ʃˈɔːlaɪn// shore·line
n. the place where a large body of water, like an ocean or lake, meets the land.
n. the line or strip of land where a body of water meets the shore.
We walked along the shoreline at sunset.
The recent storm caused significant erosion along the rocky shoreline, damaging several coastal homes.
Ecologists are monitoring the shoreline to determine how rising sea levels might affect the nesting habits of local bird populations over the next decade.
From shore + line.
Usage
Often used with the preposition 'along'.