D defs.my
Entry 2 senses Webster, 1913

Regardless

· Re·gard·less · IPA /ɹɪˈɡɑɹd.lɪs/
01 a. Having no regard; heedless; careless; as, regardless of life, consequences, dignity.
  1. 1.
    Having no regard; heedless; careless; as, regardless of life, consequences, dignity.
    Regardless of the bliss wherein he sat.” Milton.
  2. 2.
    Not regarded; slighted.[R.]