To have discovered or perceived the presence, existence, or fact of something, especially something concealed or not easily noticed.
Detection often implies the use of specific methods, instruments, or heightened senses to identify and recognize a particular phenomenon.
It can involve a range of processes, from the identification of a simple object to the identification of subtle changes in complex data.
The accuracy and sensitivity of detection are dependent on the methods employed and the characteristics of what is being detected.
SAW
SEEN
SENSED TRACED ESPIED
NOTICED
REGISTERED