"drone" in the noun sense
stingless male bee in a colony of social bees (especially honeybees) whose sole function is to mate with the queen
2. monotone, drone, droning
an unchanging intonation
3. dawdler, drone, laggard, lagger, trailer, poke
someone who takes more time than necessary someone who lags behind
4. drone, pilotless aircraft, radio-controlled aircraft
an aircraft without a pilot that is operated by remote control
5. drone, drone pipe, bourdon
a pipe of the bagpipe that is tuned to produce a single continuous tone
"drone" in the verb sense
make a monotonous low dull sound
"The harmonium was droning on"
2. drone, drone on
talk in a monotonous voice
Source: WordNet® (An amazing lexical database of English)
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