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From The Collaborative International Dictionary of English v.0.48:
Fuse \Fuse\ (f[=u]z), v. t. [imp. & p. p. Fused (f[=u]zd); p. pr. & vb. n. Fusing.] [L. fusus, p. p. of fundere to pour, melt, cast. See Foundo to cast, and cf. Futile.] 1. To liquefy by heat; to render fluid; to dissolve; to melt. [1913 Webster] 2. To unite or blend, as if melted together. [1913 Webster] Whose fancy fuses old and new. --Tennyson. [1913 Webster]