iceberg

noun
ice*berg \ ˈīs-ˌbərg \
1784{ds||1||}
  • a large floating mass of ice detached from a glacier
  • an emotionally cold person
  • iceberg lettuce

iceberg lettuce

noun
iceberg lettuce \
1893
  • any of various crisp light green lettuces that when mature have the leaves arranged in a compact head

tip of the iceberg

noun phrase
tip of the iceberg \
1969
  • the earliest, most obvious, or most superficial manifestation of some phenomenon

the tip of the iceberg

noun phrase
the tip of the iceberg \
  • a small part of something (such as a problem) that is seen or known about when there is a much larger part that is not seen or known about
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