Guideline

Origin

From guide + line

Full definition of guideline

Noun

1. A non-specific rule or principle that provides direction to action or behaviour.He considered the Ten Commandments more a guideline than a requirement.
2. A plan or explanation to guide one in setting standards or determining a course of action.
3. A light line, used in lettering, to help align the text.

Synonyms

• (non-specific rule) rule of thumb
• (plan or explanation) rule of thumb