The term "small time" often refers to something insignificant or minor in comparison to something grand or important. The antonyms for the word "small time" would therefore be phrases that convey the opposite meaning. They include words such as significant, major, noteworthy, exceptional, and grand, among others. While "small time" may suggest a lack of importance, these antonyms emphasize things that are significant or grand, highlighting their elevated status. Using antonyms offers a chance to convey the opposite meaning and emphasize the importance of a situation or person, while infusing a sense of grandeur to the description.