1.slanderous defamation
2.a thin tissue or blood sample spread on a glass slide and stained for cytologic examination and diagnosis under a microscope
3.a blemish made by dirt;
he had a smudge on his cheek
4.an act that brings discredit to the person who does it;
he made a huge blot on his copybook
1.stain by smearing or daubing with a dirty substance
2.make a smudge on; soil by smudging
3.cover (a surface) by smearing (a substance) over it;
smear the wall with paint
4.charge falsely or with malicious intent; attack the good name and reputation of someone;
The journalists have defamed me! The article in the paper sullied my reputation