adj. 1 lone, single, sole, individual; unattended, solo, companionless, friendless, lonesome, lonely, unsocial, cloistered, secluded, reclusive, separate, eremitic(al), hermitic(al), remote, withdrawn, distant, out-of-the-way, unfrequented, desolate There is not a solitary exception to the rule Flora's solitary style of living allows her to concentrate on her writing. There is a solitary little inn where we go for weekends.
n. 2 solitary confinement The prisoner has been in solitary for striking a guard