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1. A tube-shaped optical instrument that is rotated to produce a succession of symmetrical designs by means of mirrors reflecting the constantly changing patterns made by small objects, such as beads or bits of colored glass, at one end of the tube.
2. A constantly changing set of colors.
3. A series of changing phases or events: a kaleidoscope of illusions.
ka·lei′do·scop′ic (-skŏp′ĭk), ka·lei′do·scop′i·cal adj.