Definition of check on

The phrase "check on" evolved from the verb "check," which originally meant "to examine closely" or "to verify," as the word's Old French root "chec" suggests. In the 15th century, "check" began to be used to mean a mark or token placed on a board game piece or card, signifying that player's turn was over. By the 19th century, "check" was being used figuratively to mean "to supervise or examine" someone or something, particularly in terms of safety or well-being. For example, a restaurant might "check" the grill or oven regularly to ensure that the food is cooked to a safe temperature, or a parent might "check" on their child before bedtime to make sure they're settled in and comfortable. In this sense, "check on" originally meant "to monitor or inspect someone or something for a specific purpose," typically related to safety or security. As the phrase has evolved, it's come to have a broader range of applications, from simply asking someone "what are you up to?" to wanting to ensure someone's mental or emotional health. The use of the phrase has also expanded beyond just safety concerns and now includes routine inquiries, expressing concern for someone else's welfare, and validating whether one's actions are proceeding appropriately.