1. An exclamation expressing disgust, frustration, or surprise.
Usage: informal; often used in comic strips and casual speech

1. In telecommunications and computing, an acknowledgment signal or message confirming receipt of data.
Usage: technical; abbreviation of 'acknowledgment'

1. To send or receive an acknowledgment signal in data transmission.
Usage: technical; computing and networking contexts

Examples

• Ack! I spilled coffee all over my shirt.
• The server sent an ack packet to confirm the message was received.
• The system will ack the request within milliseconds.
• Ack, that's the third time I've made that mistake!
• When the device acks the transmission, we know it's safe to proceed.