D defs.my
Entry 3 senses Webster, 1913

Idler

/īd'-əl-ẽr/ · I·dler · IPA /ˈaɪdələr/
01 n. One who idles; one who spends his time in inaction; a lazy person; a sluggard.
  1. 1.
    One who idles; one who spends his time in inaction; a lazy person; a sluggard.
  2. 2.
    One who has constant day duties on board ship, and keeps no regular watch.(Naut.)
  3. 3.
    An idle wheel or pulley. See under Idle.(Mach.) See: Idle