put to sea put (out) to sea3 F0 (of a ship) to leave a port and start a journey: » The boats will put (out) to sea on this evening's high tide.Thesaurus+: ↑Arriving and departing by boat or ship4 F0 [C] one of the large, flat areas on the moon that in the past were thought to be seas Thesaurus+: ↑Astronomy - general wordsMain Entry: ↑sea
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