1. A set of tags and rules (conforming to SGML) for using them in developing hypertext documents
   - hypertext markup language, hypertext mark-up language

Type of: markup language

Encyclopedia: HTML

• three-hitter
• three-hundredth
• three-lane
• three-legged
• three-lipped
• three-lobed
• three-membered
• three-mile limit
• three-needled
• three-party
• three-petaled
• three-petalled
• three-piece
• three-piece suit
• three-ply
• three-point landing
• three-point switch
• three-point turn
• three-pronged
• three-quarter binding
• three-quarters
• three-ring circus
• three-seeded
• three-seeded mercury
• three-sided