Boyd’s Bible Dictionary:
To wash, a sign of hospitality
(Gen. 18:4; 1 Sam. 25:41; John 13:5-6). To remove shoes, a reverence (Ex. 3:5); sign of mourning (Ezek. 24:17).
Strong’s Dictionary of Hebrew Words:
Meaning:
denominative from 7272; (plural for collective) a footpiece, i.e. (adverbially) at the foot, or (direct.) the foot itself