To join a phone call or video call.
Used other than figuratively or idiomatically: see hop, on.
To begin playing a video game.
To telephone; to call someone on the telephone.
To strikeout a batter and thereby send him or her back to the dugout.
To record the payment of.
To enter (a payment) into a cash register, or till in a shop, or record a credit- or debit-card payment.
To make an adverse official decision concerning (a person).
To rouse by the ringing of a bell.