Entry 1 sense Webster, 1913 Legerdemain /(lĕj`ẽr*dē̇*mān")/ · Leg·er·de·main · IPA /ˈlɛd͡ʒ.əɹ.dəˌmeɪn/ 01 n. Sleight of hand; a trick of sleight of hand; hence, any artful deception or trick. 1. Sleight of hand; a trick of sleight of hand; hence, any artful deception or trick. “He of legierdemayne the mysteries did know.” — Spenser. “The tricks and legerdemain by which men impose upon their own souls.” — South.