HyperDic: heavy_swell

English > 1 sense of the expression *heavy swell*:
NOUN	event	heavy swell, ground swell	a broad and deep undulation of the ocean

English > *heavy swell*: 1 sense > noun 1, event
Meaning	A broad and deep undulation of the ocean.
Synonym	ground swell
Broader	swell, crestless wave	The undulating movement of the surface of the open sea
Spanish	mar de fondo, mar de leva
Catalan	mar de fons, mar de fora, mar de lluny, mar forana, mar llarguera