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

• Ptloris paradisea
• PTO
• Ptolemaic
• Ptolemaic dynasty
• Ptolemaic system
• Ptolemies
• Ptolemy
• Ptolemy I
• Ptolemy II
• ptomain
• ptomaine
• ptomaine poisoning
• ptosis
• PTSD
• ptyalin
• ptyalise
• ptyalism
• ptyalith
• ptyalize
• Ptyas
• Ptyas mucosus
• Ptychozoon
• Ptychozoon homalocephalum
• Pu
• pub