ack.
51ACK — • ACKnowledge …
52AcK — • francium [actinium K] …
53ack — /æk/ (say ak) interjection Colloquial (an exclamation of shocked surprise, disappointment, dismay, etc.) …
54ACK — See acknowledgment …
55ACK — See acknowledgment code …
56ACK — comp. abbr. Acknowledgment acronym ACKnowledge …
57ack — abbreviation acknowledge; acknowledgment …
58ack. — 1. acknowledge. 2. acknowledgment …
59ack-ack — noun Etymology: British signalmen s former telephone pronunciation of AA, abbreviation of antiaircraft Date: 1926 an antiaircraft gun; also antiaircraft fire …
60ack ack — (British) signalmen s former telephone pronunciation of AA; antiaircraft gun …