mini has 1 distinct synonym spread across 1 of its 2 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its 2 recorded opposites are midi, maxi.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
used of women's clothing; very short with hemline above the knee
“a mini dress”
Synonyms, antonyms and the broader and narrower relations for mini come from Princeton University’s WordNet. Full sources and licences.