What is "tadasana"

n. (context asana English) A position in which one stands straight upright with feet together and hands by one's sides.

Tadasana (; ; IAST: Tāḍāsana), Samasthiti (; ; IAST: samasthitiḥ), or Mountain Pose is an asana. Depending on the Yoga lineage practised, Samasthitiḥ and Tāḍāsana may refer to the same asana or another similar asana.