1. Inclined to secrecy or reticence about divulging information
   - close, closelipped, secretive, tightlipped

See also: incommunicative, uncommunicative

• phone card
• phone company
• phone cord
• phone jack
• phone line
• phone message
• phone number
• phone plug
• phone service
• phone system
• phone tapper
• phone-in
• phonebook
• phoneme
• phonemic
• phonemic system
• phonemics
• phoner
• phonetic
• phonetic alphabet
• phonetic symbol
• phonetic transcription
• phonetically
• phonetician
• red spruce