• noun:   a pipe that has several lateral outlets to or from other pipes
• noun:   a set of points such as those of a closed surface or and analogue in three or more dimensions
• noun:   a lightweight paper used with carbon paper to make multiple copies

  Example: "An original and two manifolds"

• verb:   make multiple copies of
• verb:   combine or increase by multiplication
• adjective:   many and varied; having many features or forms

  Example: "Manifold reasons"

• name:  A surname (very rare: popularity rank in the U.S.: #55697)

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