/uys"berrg/ , n.
1. a large floating mass of ice, detached from a glacier and carried out to sea.
2. Informal. an emotionally cold person.
3. Australian Informal. a person who swims or surfs regularly in winter.
4. tip of the iceberg , the first hint or revelation of something larger or more complex: The new evidence in the case is just the tip of the iceberg.
[ 1765-75; half Anglicization, half adoption of D ijsberg ice mountain; c. G Eisberg, Sw isberg ]