detect /dɪˈtɛkt/verb 2adjective 1forms 5 verb2 •To discover or notice, especially by careful search, examination, or probing.The forensic examiners detected tiny traces of the poison on the suspect's gloves.On entering the room, I immediately detected the smell of gas. •(informal) To work or solve cases as a detective.Let me introduce myself: Mike MacAdam, hotel detective. / H-how d-’you do? / Mind if I begin detecting? — 1978 adjective1 •(no longer used) Detected. formsdetected · detecting · detecteth · detects · detectest