noun

• (by extension) Any interconnected set of persons, places, or things, which, when diagrammed, resembles a spider's web.
  "The time of his birth, his birth-place, his parentage, are all involved in obscurity; and such has been the perplexing ingenuity of commentators, that it is difficult to extricate the truth from the web of conjectures with which it is interwoven."
• (baseball) The part of a baseball mitt between the forefinger and thumb, the webbing.
  "He caught the ball in the web."
• (usually with "spin", "weave", or similar verbs) A tall tale with more complexity than a myth or legend.
  "Careful—she knows how to spin a good web, but don't lean too hard on what she says."
• (rail transport) The thinner vertical section of a railway rail between the top (head) and bottom (foot) of the rail.

verb

• (intransitive) To construct or form a web.
• (transitive) To cover with a web or network.
  "The canker worm has no shelter upon the tree, but lies out upon the leaf or branch ; this forms itself a house by webbing the corner of a leaf, into which it retreats on the first appearance of danger[…]"
• (transitive) To ensnare or entangle.
• (transitive) To provide with a web.