muscleless /ˈməsəl(l)ɪs/ adjective2 •Lacking muscle tissue.Many people came there now—masculine women and muscleless men, for the most part. — 1904 •Feeble, weak, lacking strength or power.As they came near, even Marcia could note the sleek, soft look of the men, and their listless, muscleless gait; while their leader's hair and person literally reeked with perfumes. — 1901