1. (

• detection ,
• sensing

) the perception that something has occurred or some state exists; "early detection can often lead to a cure" ;

2. (

• detection ,
• catching ,
• espial ,
• spying ,
• spotting

) the act of detecting something; catching sight of something ;

3. (

• signal_detection ,
• detection

) the detection that a signal is being received ;

4. (

• detection ,
• detecting ,
• detective_work ,
• sleuthing

) a police investigation to determine the perpetrator; "detection is hard on the feet" ;