Manifold a. : Various in kind or quality; many in number; numerous; multiplied; complicated.

Manifold a. : Exhibited at divers times or in various ways; -- used to qualify nouns in the singular number.

Manifold n. : A copy of a writing made by the manifold process.

Manifold n. : A cylindrical pipe fitting, having a number of lateral outlets, for connecting one pipe with several others.

Manifold n. : The third stomach of a ruminant animal.

Manifold v. t. : To take copies of by the process of manifold writing; as, to manifold a letter.

Example:
what is the intake Manifold has to do with making your car faster ?

Taxonomy
manifold, map, charts, circle, sphere, topological manifold, dimension, Euclidean space, invariant, boundary, transition, transition functions, differentiable manifold, Riemannian manifold, manifold with boundary, Rn, the charts, mathematical atlas.

Defination from the web:
manifold is a mathematical space that on a small enough scale ... More formally, every point of an n-dimensional manifold has a neighborhood homeomorphic to the n-dimensional space Rn. ...