Definition of "Once" :
adverb: on one occasion
"Once I ran into her."
adverb: at a previous time
"She was a dancer once."
adverb: as soon as
"Once we are home, we can rest."
adverb: on one occasion
"Once I ran into her."
adverb: at a previous time
"She was a dancer once."
adverb: as soon as
"Once we are home, we can rest."