1 definition found From The Collaborative International Dictionary of English v.0.44 [gcide]: Prolongate \Pro*lon"gate\, verb (used with an object) [imp. & p. p. {Prolongated}; p. pr. & vb. n. {Prolongating}.] [L. prolongatus, p. p. of prolongare. See {Prolong}.] To prolong; to extend in space or in time. [R.]

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