of, living in, or produced by the ocean: oceanic currents.
of or pertaining to the region of water lying above the bathyal, abyssal, and hadal zones of the sea bottom. Compare neritic, pelagic.
immensely large; vast: an oceanic expanse of stars.
(initial capital letter) of or pertaining to Oceania, its peoples, or their languages.

1650–60; < Medieval Latin ōceanicus, equivalent to Latin ōcean(us) ocean + -icus -ic

preoceanic, adjective
unoceanic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
oceanic (ˌəʊʃɪˈænɪk)
1.  of or relating to the ocean
2.  living in the depths of the ocean beyond the continental shelf at a depth exceeding 200 metres: oceanic fauna
3.  huge or overwhelming
4.  (of geological formations) of volcanic origin, arising from the ocean: oceanic islands

Oceanic (ˌəʊʃɪˈænɪk)
1.  a branch, group, or subfamily of the Malayo-Polynesian family of languages, comprising Polynesian and Melanesian
2.  of, relating to, or belonging to this group of languages
3.  of or relating to Oceania

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1650s, from Mod.L. oceanicus, from L. oceanus (see ocean).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
oceanic   (ō'shē-ān'ĭk)  Pronunciation Key 
  1. Relating to the ocean.

  2. Relating to the ocean waters that lie beyond the continental shelf and exceed 200 m (656 ft) in depth. Compare neritic. See more at epipelagic zone.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Therefore, the pattern of oceanic winds should matter a lot to their survival,
  especially during breeding season.
The theory is that volcanic eruptions beneath the ocean create new oceanic
  crust, which then moves away from the ridge.
Island-arc volcanoes occur at subduction zones, where two oceanic plates
  collide and one is pushed under the other.
On a more general note, trans oceanic freight is a huge industry and for good
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