UDAL Meaning of UDAL in English add. ·- ·alt. of udalman. 2. udal ·noun in shetland and orkney, a freehold; property held by udal, or allodial, right. 3. udal ·adj allodial; a term used in finland, shetland, and orkney. ·see allodial. Webster English vocab. Английский словарь Webster. 2012