guide ‧ line AC /ˈɡaɪdlaɪn/ BrE AmE noun [countable usually plural]
1 . rules or instructions about the best way to do something
guideline for
a new set of guidelines for teachers
guideline on
guidelines on the employment of children
draw up/issue guidelines
The hospital has issued new guidelines on the treatment of mentally ill patients.
This chapter gives you some guidelines to help you in your work.
clear/strict guidelines
Today most planning authorities enforce fairly strict guidelines on new houses.
2 . something that helps you form an opinion or make a decision:
When starting a new business, try to follow these general guidelines.
within ... guidelines
Teachers can choose books within certain broad guidelines.