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Definition of iceberg noun from the Oxford Advanced Learner's Dictionary

iceberg

noun
 
/ˈaɪsbɜːɡ/
 
/ˈaɪsbɜːrɡ/
Idioms
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  1. an extremely large mass of ice floating in the sea
    • The ship struck a hidden iceberg.
    Topics Geographyc1
    Oxford Collocations DictionaryIceberg is used before these nouns:
    • lettuce
    See full entry
    Word Originlate 18th cent.: from Dutch ijsberg, from ijs ‘ice’ + berg ‘hill’.
Idioms
the tip of the iceberg
  1. only a small part of a much larger problem
    • This figure represents only the tip of the iceberg, since as many as 90% of cases go unreported.
See iceberg in the Oxford Advanced American DictionarySee iceberg in the Oxford Learner's Dictionary of Academic English

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