1. Stingless male bee in a colony of social bees (especially honeybees) whose sole function is to mate with the queen (synset 102209831)
  2. An unchanging intonation (synset 107098752)
  3. Someone who takes more time than necessary;
    Someone who lags behind (synset 110012790)
  4. An aircraft without a pilot that is operated by remote control (synset 103250592)
  5. A pipe of the bagpipe that is tuned to produce a single continuous tone (synset 103250427)
  1. Make a monotonous low dull sound (synset 202192888)
    "The harmonium was droning on"
  2. Talk in a monotonous voice (synset 200946820)

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