1) Along or following a coast 2) By way of, or along the coast 3) Coastal 1) Coastways 
• (adv.) Alt. of Coastways
Coast'wise` (-wīz`), Coast'ways` adverb By way of, or along, the coast. 
Domestic shipping routes along a single coast.
[adj] - along or following a coast 2. [adv] - by way of, or along the coast
adjective along or following a coast; `coastal shipping`; `coastwise winds contributed to the storm`
along the coast: We sailed coastwise for days before finding a harbor.