Crossword clues for Sign. 4 lettersAnswerClueSIGNCommunicate silentlySIGNSpeak with one's handsSIGNTalk with one's handsSIGNCatcher's communicationSIGNSymptomSIGNSagittarius or CapricornSIGNBillboardSIGNDriving instructor?SIGNOne might say "stop"SIGNSet down your John HancockSIGNRatifySIGNOne of 12 in the zodiacSIGNSTOP or EXITSIGNPortentSIGNProtester's placardSIGNAutographSIGNHoroscope headingSIGNMake official, as a checkSIGNLamppost attachmentSIGNWith 62-Down, some account verificationsSIGNCommunicate manuallySIGNPickup-line requestSIGNLeo, for oneSIGNNo Ball Playing, e.g.SIGNGemini, for oneSIGNRoadside displaySIGNTalk silentlySIGNLeo or LibraSIGNLeo or VirgoSIGNLibra or LeoSIGNUse ASLSIGNPut one's name down onSIGNSpeak manuallySIGNAquarius, e.g.SIGNAuthorizeSIGNFinalize a contractSIGNTalk digitallySIGNCommunicate digitallySIGNPut one's name onSIGNSandwich board, e.g.SIGNSpeak to the deafSIGNWrite one's name onSIGNOne might convince you to break a habitSIGNTalk to the deafSIGNEndorseSIGNMake one's markSIGNSymbol.SIGNUse AmeslanSIGNKeep off the grass, e.g.SIGNAffix one's John Hancock