Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Adjective: tactless  takt-lus
  1. Revealing lack of perceptiveness, judgment or finesse
    "it was tactless to bring up those disagreeable";
    - inept
  2. Lacking or showing a lack of what is fitting and considerate in dealing with others
    "in the circumstances it was tactless to ask her age";
    - untactful

See also: inconsiderate, inelegant, maladroit