1A local product or item bought while traveling, meant to be given as a gift to family, friends, or coworkers.
京都のお土産に八つ橋を買った。
I bought yatsuhashi as a souvenir from Kyoto.
出張のお土産は何がいいか迷っている。
I can't decide what would make a good souvenir from my business trip.
会社のみんなにお土産を配った。
I handed out souvenirs to everyone at work.
空港でお土産を買う時間がなかった。
I didn't have time to buy souvenirs at the airport.
2A small gift brought along when visiting someone's home.
友達の家に行くとき、お土産にお菓子を持って行った。
When I visited my friend's house, I brought sweets as a gift.
お土産、気を遣わなくてよかったのに。
You didn't need to worry about bringing a gift.
3An unwanted thing brought back as a result of a trip or event — used ironically.
旅行のお土産に風邪をもらってしまった。
I came back from the trip with a cold as an unwanted 'souvenir'.
出張のお土産は疲労だけだった。
All I brought back from the business trip was exhaustion.