Being in fashion refers to the trend or style that is popular at a particular time. Synonyms for 'be in fashion' include to be trendy, up-to-date, trendy, fashionable, in vogue or in style. Being on-trend refers to having the latest fashions or keeping up with the latest fashion trends. Being in vogue means being in fashion. Being fashionable indicates keeping up with fashion styles and trends. Being with it indicates staying current and trendy in your fashion choices. Whatever term you choose, being in fashion often means keeping up with the latest trends and styles in clothing, accessories, and overall personal style.