Meaning of “detect” in the English Dictionary

"detect" in British English

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detectverb [ T ]

uk /dɪˈtekt/ us /dɪˈtekt/

C1 to notice something that is partly hidden or not clear, or to discover something, especially using a special method:

Some sounds cannot be detected by the human ear.
Financial experts have detected signs that the economy is beginning to improve.

C1 to discover something, usually using special equipment:

High levels of lead were detected in the atmosphere.
Radar equipment is used to detect (= find the position of) enemy aircraft.

More examples

detectable
adjective uk /dɪˈtek.tə.bəl/ us /dɪˈtek.tə.bəl/

There has been no detectable change in the patient's condition.

(Definition of “detect” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"detect" in American English

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detectverb [ T ]

us /dɪˈtekt/

to notice something that is partly hidden or not clear or to discover something, esp. using a special method:

Some sounds cannot be detected by the human ear.
X-ray procedures can detect a tumor when it is still small.
detectable
adjective us /dɪˈtek·tə·bəl/

There has been no detectable change in the patient’s condition.
detection
noun [ U ] us /dɪˈtek·ʃən/

These tests can result in the early detection of disease.
detector
noun [ C ] us /dɪˈtek·tər/

(Definition of “detect” from the Cambridge Academic Content Dictionary © Cambridge University Press)