What is the meaning of Py?

Initialism of pack-year.

Initialism of pinyin.

Pronunciation spelling of by.

gown

what, which

flea

A male given name of historical usage, notably borne by Piye, a pharaoh of the Twenty-fifth Dynasty

Alternative form of pj (this)

Unmarked for number and gender, but treated syntactically as masculine plurals when used with participles and relative forms, and as feminine singulars when referred to by resumptive pronouns.

Joined by n(j) to nouns they modify.

Used with suffix pronouns.

Originally joined by n(j) to nouns they modify; later without it.

foot

Contraction of pay.

foot

Alternative form of pye (magpie)

foot; paw (part of the body)

interior; inside

to blow (to produce an air current)

to blow; to flute (to blow a musical instrument to make it give a sound)

width

wide; large

spacious; roomy

pyeong an areal unit of measure symbol/abbreviation for a traditional Korean unit

why, for what reason

what, which

Source: wiktionary.org