What is the meaning of Once?
One and only one time.
Formerly; during some period in the past.
At any time; ever.
One day, someday.
Multiplied by one: indicating that a number is multiplied by one.
As soon as; when; after.
Obsolete form of ounce.
eleven
ounce (avoirdupois ounce)
a little bit
snow leopard
ounce
eleven
plural of oncia
Alternative form of ones
eleven
elevenses, snack (bread with tea or coffee)
Source: wiktionary.org