v. i. To unite, embrace, communicate with, or flow into, one another; to be connected in one system; to lock into one another; to interlace firmly. [ 1913 Webster ]
v. t.
My lady with her fingers interlocked. Tennyson. [ 1913 Webster ]
a. Connected together in such a manner that the parts work together as a single unit, or in a coordianted manner. [ PJC ]