collector in WordNet English dictionary

1. a person who is employed to collect payments (as for rent or taxes)
   collector  gatherer  accumulator 
   
2. a person who collects things
   collector  aggregator 
   
3. the electrode in a transistor through which a primary flow of carriers leaves the region between the electrodes
   collector 
   
4. a crater that has collected cosmic material hitting the earth
   collector