guideline
gui·de·line
noun
2.
3.
a rule or principle that provides guidance to appropriate behavior
Origin
From guide + line.
Related words
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.