DETECT

[verb] [T] - to notice (something that is partly hidden or not clear) or to discover (something) esp. using a special methodSome sounds cannot be detected by the human ear. [T]Financial experts have detected signs that the economy is beginning to improve.(esp. humorous) Do I detect a note of irritation in your voice, Ann?High levels of lead have been detected (= discovered using special equipment) in the atmosphere. [T]Radar equipment is used to detect (= find the position of) enemy aircraft. [T]