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(Nautical Terms) a platform round the masthead of a sailing ship
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|Noun||1.||round top - a canvas tent to house the audience at a circus performance; "he was afraid of a fire in the circus tent"; "they had the big top up in less than an hour"|
circus - an arena consisting of an oval or circular area enclosed by tiers of seats and usually covered by a tent; "they used the elephants to help put up the circus"