A catamaran is a type of sailboat with two hulls that are parallel to each other and are joined by the deck.

A catamaran's distinguishing feature is its two-part structure. It has two hulls that are side by side, linked by a single deck. Catamaran is one of a few English words that come from Tamil, and it was originally a simple boat with two hulls made from tied tree trunks. Now it can be a much fancier sailboat such as a yacht.

Definitions of catamaran
  1. noun
    a sailboat with two parallel hulls held together by single deck
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    type of:
    sailboat, sailing boat
    a small sailing vessel; usually with a single mast
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