1. (

• spotter ,

) a worker employed at a dry-cleaning establishment to remove spots ;

2. (

• spotter ,

) a worker employed to apply spots (as markers or identifiers) ;

3. (

• lookout ,
• lookout_man ,
• sentinel ,
• sentry ,
• watch ,
• spotter ,
• scout ,
• picket ,

) a person employed to keep watch for some anticipated event ;

4. (

• finder ,
• discoverer ,
• spotter

) someone who is the first to observe something ;