Definition of 足下 (そっか)

noun
1.
at one's feet, underfoot
See also:足元
2.
a respectful term written after the addressee's name in a formal letter
pronoun
3.
you, thou(honorific language)(epistolary style)
Related Kanji
leg, foot, be sufficient, counter for pairs of footwear
below, down, descend, give, low, inferior