1. people who walk around at night, especially while sleepwalking
Usage: formal; medical

Examples

• The sleep clinic specializes in treating noctambulists and other sleep disorder patients.
• Noctambulists often have no memory of their nighttime wanderings.
• The hotel installed motion sensors to alert staff when noctambulists left their rooms.
• Medical researchers study noctambulists to better understand sleep disorders.
• Safety measures are important for households with noctambulists.
• The documentary featured interviews with several noctambulists describing their experiences.