買い物 (kaimono) means “shopping” | MotiTan Japanese Dictionary

More examples

週末は家族と買い物に行きます。shū matsu wa ka zoku to ka i mono ni i ki ma su

I go shopping with my family on weekends.

必要な物をメモしてから、買い物に出かけます。hitsu yō na mono o me mo shi te ka ra ka i mono ni de ka ke ma su

I make a note of what I need before going shopping.

Centers on obtaining things by buying them, covering both the activity of shopping and the purchases made.

ショッピングshoppingu: The activity of looking for and buying goods, often for pleasure.
買い出しkaidashi: A trip to buy needed food or supplies.
購入kōnyū: The act of obtaining something by paying for it.

商品や必要な物を買うこと。また、買った物。shō hin ya hitsu yō na mono o ka u ko to ma ta ka tta mono

買い物 (kaimono) consists of 買い (kai, "buying"), from 買う (kau, "to buy"), and 物 (mono, "thing"), giving the sense of buying things.

In conversational Japanese, 買い物 (kaimono) is a noun, so 買い物をする (kaimono o suru) means "to go shopping."