drone

Noun

• a pipe of the bagpipe that is tuned to produce a single continuous tone

• an aircraft without a pilot that is operated by remote control

• someone who takes more time than necessary; someone who lags behind

• an unchanging intonation

• stingless male bee in a colony of social bees (especially honeybees) whose sole function is to mate with the queen

Verb

• talk in a monotonous voice

• make a monotonous low dull sound
  • The harmonium was droning on
    

Related words

• Synonyms: 
  drone pipe , bourdon , pilotless aircraft , radio-controlled aircraft , dawdler , laggard , lagger , trailer , poke , monotone , droning , drone on