We found 3 dictionaries that define the word acks:

General (2 matching dictionaries)

1. acks: Wordnik
2. ACKs, acks: Wiktionary

Slang (1 matching dictionary)

3. acks: Urban Dictionary

Opposite: nacks, negatives, denials, refusals, rejections Phrases: ack acks, more... ▸ Words similar to acks ▸ Usage examples for acks ▸ Idioms related to acks ▸ Wikipedia articles (New!) ▸ Words that often appear near acks ▸ Rhymes of acks ▸ Invented words related to acks