1. (informal) an adult whose interests and behaviour follow youth culture; someone who hasn't fully grown up

Derived forms: adultescents

• space travel
• space vehicle
• space writer
• space-reflection symmetry
• space-time
• space-time continuum
• spacecraft
• spacecraft clock time
• spacecraft event time
• spaced
• spaced-out
• spacefaring
• spaceflight
• spaceless
• spaceman
• spacer
• spaceship
• spacesuit
• spacewalk
• spacewalker
• spaceward
• spacewards
• spacewoman
• spacey
• spacial