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 (nŏk-tăm′byə-lĭz′əm) also noc·tam·bu·la·tion (-tăm′byə-lā′shən)
[noct(i)- + Latin ambulāre, to walk + -ism.]

noc·tam′bu·list n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.noctambulation - walking by a person who is asleepnoctambulation - walking by a person who is asleep  
walk, walking - the act of traveling by foot; "walking is a healthy form of exercise"
sleeping - the suspension of consciousness and decrease in metabolic rate