1. A rule or principle that provides guidance to appropriate behaviour
   - guideline, rule of thumb 
2. A post bearing a sign that gives directions or shows the way
   - signpost

Derived forms: guideposts

Type of: regulation, rule, sign

• air-sleeve
• air-to-air
• air-to-air missile
• air-to-ground
• air-to-ground missile
• air-to-surface
• air-to-surface missile
• airborne
• airborne patrol
• airborne transmission
• airbrake
• airbrush
• airburst
• airbus
• aircraft
• aircraft carrier
• aircraft engine
• aircraft landing
• aircraftman
• aircraftsman
• aircrew
• aircrewman
• airdock
• airdrome
• airdrop