guide
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.
Example
“The guide led us around the museum and explained the exhibits.”
Other meanings
A document or book that offers information or instruction; guidebook.
A sign that guides people; guidepost.
Example sentences
Word history
From Old French "guide".
Where this comes from
This definition is adapted from “guide” on Wiktionary, by its contributors; example sentences are from Tatoeba, credited to their authors above, published under CC BY-SA 4.0. This page is published under the same licence.