From WordNet (r) 3.0 (2006) [wn]:
trapeze
n 1: a swing used by circus acrobats
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Trapeze \Tra*peze"\, n. [Cf. F. trap[`e]ze.]
1. (Geom.) A trapezium. See Trapezium, 1.
[1913 Webster]
2. A swinging horizontal bar, suspended at each end by a
rope; -- used by gymnasts.
[1913 Webster]