Real Dictionary

mesh
variable noun: Mesh is material like a net made from wire, thread, or plastic.
verb: If two things or ideas mesh or are meshed, they go together well or fit together closely.

mesh in American English
any of the open spaces of a net, screen, sieve, etc.: a 50-mesh screen is one with 50 such open spaces per linear inch
to entangle or become entangled
intransitive verb: to become enmeshed
noun: any knit, woven, or knotted fabric of open texture
transitive verb: to catch or entangle in or as if in a net; enmesh

mesh in British English
noun: a network; net
verb: to entangle or become entangled

mesh in Mechanical Engineering
verb: If gear teeth mesh with other gear teeth, or are meshed with them, they fit together and start working together.