#1 spotter n. a worker employed at a dry-cleaning establishment to remove spots. wn
#2 spotter n. a worker employed to apply spots (as markers or identifiers). wn
#3 spotter n. [lookout, lookout man, sentinel, sentry, watch, scout, picket] a person employed to keep watch for some anticipated event. wn
#4 spotter n. [finder, discoverer] someone who is the first to observe something. wn
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