sea

1. (attributive, in combination) Living or used in or on the sea; of, near, or like the sea.Examples: "Seaman, sea gauge, sea monster, sea horse, sea level, seaworthy, seaport, seaboard, etc."attributivein-compounds

2. (figurative) Anything resembling the vastness or turbulence of the sea in mass, size or quantity.Examples: "To be, or not to be, that is the queſtion, / Whether tis nobler in the minde to ſuffer / The ſlings and arrowes of outragious fortune, / Or to take Armes againſt a ſea of troubles, / And by oppoſing, end them, to die to ſleepe / No more, and by a ſleepe, to ſay we end / The hart-ake, and the thouſand naturall ſhocks / That fleſh is heire to; […]"; "Secondly, in terms of geopolitics Central Asia was a huge sea of barbarians set in the midst of interlocking continents. Thanks to its border on the Siberian forest in the north, it was open to barbarian incomers who would upset existing polities and set migrations going."; "The beck is crossed by a pretty ford and a number of bridges, and in spring the cottages look out over a dancing sea of daffodils."figuratively

3. (physics) A constant flux of gluons splitting into quarks, which annihilate to produce further gluons.

4. (planetology) A large, dark plain of rock; a mare.Examples: "The Apollo 11 mission landed in the Sea of Tranquility."

5. (planetology) A very large lake of liquid hydrocarbon.