Superlative adj. 1. of the highest quality or degree which sentence uses the given definition of the word superlative? the students were unable to comprehend the superlative form of adjectives and adverbs. the superlative meal at the lighthouse inn was mediocre in taste and presentation. the prestigious author began to doubt her superlative writing skills when her manuscript was rejected. andrea was embarrassed when her superlative daughter threw a terrible temper tantrum in the store.