1. One's native language; the language learned by children and passed from one generation to the next
   - mother tongue, first language

Type of: natural language, tongue

• middle-of-the-road
• middle-sized
• middlebreaker
• middlebrow
• middleman
• middlemost
• Middleton
• middleware
• middleweight
• middling
• middlingly
• middy
• middy blouse
• Mideast
• midfield
• midfielder
• Midgard
• midge
• midget
• midgrass
• midgut
• midi
• Midi-Pyrenees
• midinette
• midiron