a device that can hold a rechargeable battery by means of an electrical cable
"I need to plug my phone into the wall charger before I head out for the day."
A device that charges or recharges.
"I left my phone charger on the kitchen counter so I could plug it in before bed."
In plain English: A charger is a device that puts electricity back into your phone or other gadgets so they can work again.
"I forgot to bring my phone charger, so my battery died halfway through the movie."
Usage: A charger is a device used to recharge batteries in portable electronics like phones and tablets. You should not use this word to describe a person who provides food or entertainment, such as at a party.
The word charger comes from Middle English, where it originally referred to a person who delivered charges or accusations. Over time, the meaning shifted to describe someone or something that carries an object, such as a knight bearing a shield on horseback or a plate used for serving food.