The word is in the Wiktionary

20 short excerpts of Wiktionnary (A collaborative project to produce a free-content dictionary.)

— English words —

• ack n. (Military, now historical) The letter A as used in signalling and other types of communications.
• ack n. (Data communications) acknowledgment signal.
• ack v. Alternative form of ACK.
• ack interj. (Radio communications) acknowledged.
• ack interj. Expressing distaste, alarm, or trepidation.
• ACK n. (Networking) An acknowledgement either of a packet or a message received from a network.
• ACK v. (Networking) To acknowledge a packet or a message received from a network.

— International convention —

• ack sym. (International standards) ISO 639-3 language code for Aka-Kora.
• ACK sym. (International standards, aviation) IATA airport code for Nantucket Memorial Airport, which serves Nantucket…
• ␆ sym. (Computing) Used as a visual representation of the control character “acknowledge”.

— Foreign words, define in English —

• Nivkh
  • асӄ n. Younger brother; little brother.
  • асӄ n. Younger sister; little sister.
• Scots
  • ack n. Act.
  • ack v. To act.
  • Ack prop.n. A male given name, equivalent to English Alexander.
• Swedish
  • ack interj. Alas, oh (Exclamation of sorrow, etc.).
  • ack n. (Electronics, slang) an electric accumulator.
  • ack. n. (Lexicography, grammar) accusative; Abbreviation of ackusativ.

— English word, defined in German —

• ACK Abk. Acknowledged (bestätigt), acknowledgement (Bestätigung, Bestätigungsmeldung).

— In French —

• ACK n.m. (Informatique) Accusé de réception. Signal logique indiquant…

85 English words from 18 English definitions

Abbreviation accumulator accusative ACK acknowledge acknowledged acknowledgement acknowledgment act airport Aka Aka-Kora alarm Alas Alexander Alternative and aviation brother character code communications Computing control control␣character Data Data␣communications distaste either electric Electronics English equivalent etc Exclamation Expressing for form from given given␣name grammar historical IATA International ISO Kora language language␣code letter Lexicography little little␣brother little␣sister male Memorial message Military name Nantucket network Networking now of␣a other packet Radio received representation serves signal signalling sister slang sorrow standards the trepidation types used visual which Younger Younger␣brother Younger␣sister

3 English words from 2 foreign definitions

Acknowledged acknowledgement Signal

8 foreign words from 2 foreign definitions

Accusé Accusé␣de␣réception bestätigt Bestätigung indiquant Informatique logique réception

86 suffixes (New words found by adding one or more letters at the end of the word.)

acks ACKs acked ACKed ackee acker Acker ackey ack-ack ackawi ackees ackers Ackert ackeys acking ACKing Acklam Ackles Ackley Acklin Ackman acknew acknow ack-acks ack␣emma Ackerly Ackerts acketon Ackford Acklams Ackland Ackleys Acklins Ackmans acknown acknows Ackroyd ackshly Ackerian Ackerley Ackerlys Ackerman Ackerson acketons Ackfords Acklands Ackleses Ackworth Ackerleys Ackermann +36 words

8370 times in the middle (New words found by adding letters in front and at the end of the word.)

Bačka Backe backs backy cacks cacky dacks Dacks facks gacks Hackl hacks hacky hačky háčky Jacki jacko Jacko jacks Jacks jacky Jacky kacks lacke Lacko lacks lackt lacky macks Macks macky nacks Packe packs packy Racka Racki racks Racks sacks Sacks sackt tacks Tacks tackt tacky vacky wacke wacko wacks Wacks +8319 words

1798 prefixes (New words found by adding one or more letters in front of the word.)

back Back back- cack dack Dack fack gack hack jack Jack kack lack mack Mack nack pack rack RACK sack tack Tack wack Wack yack zack Zack aback a-back alack arack Baack black Black brack Brack chack clack Clack crack flack Flack frack kiack knack Knack kyack Maack Noack plack +1748 words

2 anagrams (New words found by changing the order of the letters.)

AKC cak

49 anagrams found with an extra letter (New words formed with all the letters from the word and an extra letter.)

acks ACKs akçe ATCK back Back back- cack cake caky calk Calk cark Cark cask cauk cawk coak cyka dack Dack ecka fack gack hack jack Jack kack kcal KCAS KCIA lack mack Mack nack pack rack RACK sack SKCA tack Tack Tkac wack Wack yack YKCA zack Zack

30 anagrams found minus a letter (New words formed with all the letters from the word minus a letter.)

ac Ac AC ℀ -ac a-c a/c ac- ac. A/C a.c. A.C. Ak AK ca CA c@ &ca ca. &ca. C.A. Ck CK ka KA ka- kc KC K.C. K.␣C.

77 cousins (New words found by changing only one letter.)

aak ACA acc ACC acc. ACD ace Ace ACE ACF ACG ach ACH ACI ACL ACM ACP acq. ACR acr- acs ACs ACS a/cs A/Cs act Act ACT act. Act. A.C.T. A.␣C.␣T. ACU acu- ACV ACW -acy afk AFK aik AJK AKK alk ALK alk- alk. AMK AOK A-OK ark Ark Ark. ask Ask ASK ATK auk awk Bck. CCK c*ck d*ck Eck fck FCK f*ck ick ICK -ick KCK ock -ock s*ck tck TCK uck Uck

16 lipograms (New words found when removing only one letter.)

ac Ac AC ℀ -ac a-c a/c ac- ac. A/C a.c. A.C. Ak AK Ck CK

One epenthesis (New word found when adding only one letter.)

ATCK

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