Definition of "ocean"

ocean

/ˈəʊ.ʃən/

noun
countable and uncountable, plural oceans
1. (countable) One of the large bodies of water separating the continents.
2. (uncountable) Water belonging to an ocean.
3. (figuratively) An immense expanse; any vast space or quantity without apparent limits.
  Quotations
  On the present occasion, Traddles was so hemmed in by the pagoda and the guitar-case, and Dora’s flower-painting, and my writing-table, that I had serious doubts of the possibility of his using his knife and fork; but he protested, with his own good-humour, ‘Oceans of room, Copperfield! I assure you, Oceans!’
  1849 May – 1850 November, Charles Dickens, The Personal History of David Copperfield, London: Bradbury & Evans, […], published 1850
  Poison Ivy, Lord,'ll make you itchYou're gonna need an oceanOf calamine lotionYou'll be scratchin' like a houndThe minute you start to mess around
  1959, “Poison Ivy”, Jerry Leiber and Mike Stoller (lyrics), performed by The Coasters
4. A blue colour, like that of the ocean (also called ocean blue).