~ 1 [ pɒn'tu:n ]
■ noun Brit. the card game blackjack or vingt-et-un.
↘a hand of two cards totalling 21 in this game.
Origin
early 20th cent.: prob. an alt. of vingt-et-un 'twenty-one'.
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~ 2 [ pɒn'tu:n ]
■ noun
1》 a flat-bottomed boat or hollow metal cylinder used with others to support a temporary bridge or floating landing stage.
↘a bridge or landing stage supported by ~s.
2》 a large flat-bottomed barge or lighter equipped with cranes and tackle for careening ships and salvage work.
3》 either of two floats fitted to an aircraft to enable it to land on water.
Origin
C17: from Fr. ponton , from L. ponto , ponton- , from pons , pont- 'bridge'.