Noun guideline has 3 senses
- guideline - a light line that is used in lettering to help align the letters
--1 is a kind of line
- road map, guideline - a detailed plan or explanation to guide you in setting standards or determining a course of action; "the president said he had a road map for normalizing relations with Vietnam"
--2 is a kind of plan, program, programme; guidance, counsel, counseling, counselling, direction
- guidepost, guideline, rule of thumb - a rule or principle that provides guidance to appropriate behavior
--3 is a kind of rule, regulation