Spotless means perfectly clean, without any dirt, stains, or marks. A spotless kitchen has no crumbs on the counter, no sticky spills on the floor, and no smudges on the cabinet doors. When your room is spotless, everything is put away, the floor is vacuumed, and there isn't a single sock hiding under the bed.

A spotless white shirt has no coffee stains or grass marks. A spotless car gleams in the sunlight, freshly washed and without a speck of dust.

People also use spotless to describe someone's reputation or record when it's perfect and unblemished. A student with a spotless attendance record has never missed a day of school. An athlete might have a spotless record if they've never been penalized for breaking the rules. In this sense, spotless means completely free of wrongdoing or mistakes, just as a spotless mirror is free of fingerprints and smudges.