1. (informal) no longer maintaining contact or communication 
2. (informal) no longer up to date; not well informed with recent developments

Encyclopedia: Out of touch

• Hyades
• hyaena
• Hyaena brunnea
• Hyaena hyaena
• Hyaenidae
• hyalin
• hyaline
• hyaline cartilage
• hyaline membrane disease
• hyalinisation
• hyalinization
• hyalite
• hyaloid
• hyaloid membrane
• Hyalophora
• Hyalophora cecropia
• hyaloplasm
• hyaloplasmic
• Hyalosperma
• Hyalospongiae
• hyaluronic acid
• hyaluronidase
• Hyazyme
• Hybanthus
• hybrid