watchwatch2 ●●●  noun 
1
 [countable] a small clock that you wear on your wrist or carry in your pocket: 
 Scott looked at his watch.2[singular, uncountable] the process of checking a situation or a place carefully so that you always know what is happening and are ready to deal with it: 
 Police kept a 24-hour watch on the house.
 Several soldiers stood watch.
 Douglas kept watch while the others slept.3be on the watch for somebody/something to be looking and waiting for someone you might see or something that might happen: 
 Be on the watch for pickpockets.4[countable, uncountable] people employed to guard or protect someone or something, or the fixed period of the day or night when they do this: 
 the night watch
 It was my turn to be on watch.
                                            
                                        
