adj. having no tact; unaware or intentionally inconsiderate of someone else's feelings
the GNU version of the Collaborative International Dictionary of English
adj. Destitute of tact.
The Century Dictionary and Cyclopedia
Destitute of tact; characterized by want of tact.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. lacking or showing a lack of what is fitting and considerate in dealing with others
adj. revealing lack of perceptiveness or judgment or finesse
Word Usage
"I haven't found out what the trouble is, but I know you must have sinned against the girl in some way, or done something tactless, which is worse, and made her angry."