doorway

n. opening through which one enters a room

Doorway pages are web pages that are created for spamdexing, this is, for spamming the index of a search engine by inserting results for particular phrases with the purpose of sending you to a different page. They are also known as bridge pages, portal pages, zebra pages (a humorous arbitrary coinage by Jill Whalen of High Rankings Advisor), jump pages, gateway pages, entry pages and by other names. Doorway pages that redirect visitors without their knowledge use some form of cloaking.
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Noun
1. the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close; "he stuck his head in the doorway"
(synonym) door, room access, threshold
(hypernym) entrance, entranceway, entryway, entry, entree
(hyponym) exterior door, outside door
(part-holonym) wall
(part-meronym) casing, case

(n.)
The passage of a door; entrance way into a house or a room.
  

Synonyms and related words:
French door, archway, back door, barway, bulkhead, carriage entrance, cellar door, cellarway, door, doorjamb, doorpost, entrance, entranceway, entry, entryway, front door, gate, gatepost, gateway, hatch, hatchway, lintel, porch, portal, porte cochere, postern, propylaeum, pylon, scuttle, side door, stile, storm door, threshold, tollgate, trap, trap door, turnpike, turnstile,