D defs.my
Entry 3 senses Webster, 1913

Outsider

/out-sīd'-ẽr/ · Out·sid·er · IPA /ˌaʊtˈsaɪdəɹ/
01 n. One not belonging to the concern, institution, party, etc., spoken of; one disconnected in interest or feeling.
  1. 1.
    One not belonging to the concern, institution, party, etc., spoken of; one disconnected in interest or feeling.[Recent]
  2. 2.
    A locksmith's pinchers for grasping the point of a key in the keyhole, to open a door from the outside when the key is inside.
  3. 3.
    A horse which is not a favorite in the betting.[Cant]