Definitions

1. noun

a principle or rule used as a basis for making decisions or taking actions, especially in a particular profession or activity

“The doctor followed a strict guideline for administering the medication.”

2. verb

to provide or follow a guideline

“The company will guide its employees through the new policy.”

3. noun

a line or edge that marks the boundary or edge of something

“The guideline of the new road separated the old neighborhood from the new development.”