B1(in the position of being) most important or successful; best: So what would be your top choice for a holiday?As a chess player he's among the top ten percent in the country.Successful (things or people)Extremely goodB1Top people, organizations, or activities are the most important or successful ones: top athletes/executivestop jobstop universitiesVery important or urgentSuccessful (things or people)at top speed›as fast as possible: The train thundered through the station at top speed.Speed of motionFast and rapidShort in timebe/come topB2to be the student with the best results: She came top of the class in English.Sam was top at/in Science.Successful (things or people)on top formUK(USin top form)›feeling or doing things as well as possible: Paul's back on top form after his illness.Fit and healthySuccessful (things or people)