| noun | any nonverbal action or gesture that encodes a message “signals from the boat suddenly stopped” |
| verb | communicate silently and non-verbally by signals or signs “He signed his disapproval with a dismissive hand gesture” |
| verb | be a signal for or a symptom of “These symptoms indicate a serious illness” |
| signal | verb | be a signal for or a symptom of |
| signalize | verb | provide with traffic signals |
| sign | verb | make the sign of the cross over someone in order to call on God for protection; consecrate |
| signify | verb | convey or express a meaning |
| sign | noun | any nonverbal action or gesture that encodes a message |
| signer | noun | someone who can use sign language to communicate |
| signing | noun | language expressed by visible hand gestures |
| signal | noun | any nonverbal action or gesture that encodes a message |
| signaller | noun | someone who communicates by signals |
| signaler | noun | someone who communicates by signals |
| signaling | noun | any nonverbal action or gesture that encodes a message |
| indicative | adjective | (usually followed by `of') pointing out or revealing clearly |
| indication | noun | (medicine) a reason to prescribe a drug or perform a procedure |
| indicant | noun | something that serves to indicate or suggest |
| indicator | noun | a signal for attracting attention |