WordNet sense 1 (contact by fitting together):

engagement, interlocking, meshing

WordNet sense 2 (the topology of a network whose components are all connected directly to every other component):

mesh topology

WordNet sense 3 (an open fabric of string or rope or wire woven together at regular intervals):

net, network, meshwork

WordNet sense 4 (keep engaged):

engage, lock, operate

WordNet sense 5 (entangle or catch in (or as if in) a mesh):

enmesh, ensnarl

WordNet sense 6 (coordinate in such a way that all parts work together effectively):

interlock