Definition of "guide"

guide¹

/ɡaɪd/

noun
plural guides
1. Someone who guides, especially someone hired to show people around a place or an institution and offer information and explanation, or to lead them through dangerous terrain.
  Quotations
  He will be our guide, even unto death.
  1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Psalms xlviii:14
2. A document or book that offers information or instruction; guidebook.
3. A sign that guides people; guidepost.
4. Any marking or object that catches the eye to provide quick reference.
5. A device that guides part of a machine, or guides motion or action.
  1. A blade or channel for directing the flow of water to the buckets in a water wheel.
  2. A grooved director for a probe or knife in surgery.
  3. (printing, dated) A strip or device to direct the compositor's eye to the line of copy being set.
6. (occult) A spirit believed to speak through a medium.
  Quotations
  The familiars of the magicians, on the other hand, were not in all cases evil, and often may have approximated the "guides" with whom present-day spiritualists are well acquainted.
  1936, Rollo Ahmed, The Black Art, London: Long, page 75
7. (military) A member of a group marching in formation who sets the pattern of movement or alignment for the rest.

guide²

/ɡaɪd/

verb
third-person singular simple present guides, present participle guiding, simple past and past participle guided
1. to serve as a guide for someone or something; to lead or direct in a way; to conduct in a course or path.
  Quotations
  And that you'd guide me to your Soueraignes Court,
  c. 1607–1608, William Shakeſpeare, The Late, And much admired Play, Called Pericles, Prince of Tyre. […], London: Imprinted at London for Henry Goſſon, […], published 1609, [Act II, scene i]
  Kolyat: I brought a prayer book, Commander. Would you care to join me?Kolyat: Kalahira, this one's heart is pure, but beset by wickedness and contention.Shepard: Guide this one to where the traveler never tires, the lover never leaves, the hungry never starve.Shepard: Guide this one, Kalahira, and she will be a companion to you as she was to me.
  2012, BioWare, Mass Effect 3 (Science Fiction), Redwood City: Electronic Arts, PC, scene: Citadel
2. to steer or navigate, especially a ship or as a pilot.
3. to exert control or influence over someone or something.
  Quotations
  A good man sheweth fauour and lendeth: he will guide his affaires with discretion.
  1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Psalms 112:5
4. to supervise the education or training of someone.
5. (intransitive) to act as a guide.