n. [ from AA, meaning antiaircraft pronounced ack-ack by British signalmen. ] (Mil.) Artillery designed to shoot upward at airplanes; antiaircraft artillery.
Syn. -- antiaircraft, antiaircraft gun, flak, pompom, pom-pom, ack-ack gun [ WordNet 1.5 +PJC ]

n. 1. 1 red pear-shaped tropical fruit with poisonous seeds; its flesh is poisonous when unripe or overripe.
Syn. -- akee [ WordNet 1.5 ]

v. t. [ Pref. a- + know; AS. oncnāwan. ] 1. To recognize. [ Obs. ] “You will not be acknown, sir.” B. Jonson. [ 1913 Webster ]

2. To acknowledge; to confess. [ Obs. ] Chaucer. [ 1913 Webster ]

To be acknown (often with of or on), to acknowledge; to confess. [ Obs. ] [ 1913 Webster ]

We say of a stubborn body that standeth still in the denying of his fault, This man will not acknowledge his fault, or, He will not be acknown of his fault. Sir T. More. [ 1913 Webster ]

v. t. [ imp. & p. p. acknowledged p. pr. & vb. n. acknowledging ] [ Prob. fr. pref. a- + the verb knowledge. See Knowledge, and cf. Acknow. ] 1. To own or admit the knowledge of; to recognize as a fact or truth; to declare one's belief in; as, to acknowledge the being of a God. [ 1913 Webster ]

I acknowledge my transgressions. Ps. li. 3. [ 1913 Webster ]

For ends generally acknowledged to be good. Macaulay. [ 1913 Webster ]

2. To own or recognize in a particular character or relationship; to admit the claims or authority of; to give recognition to. [ 1913 Webster ]

In all thy ways acknowledge Him. Prov. iii. 6. [ 1913 Webster ]

By my soul, I'll ne'er acknowledge thee. Shak. [ 1913 Webster ]

3. To own with gratitude or as a benefit or an obligation; as, to acknowledge a favor, the receipt of a letter. [ 1913 Webster ]

They his gifts acknowledged none. Milton. [ 1913 Webster ]

4. To own as genuine; to assent to, as a legal instrument, to give it validity; to avow or admit in legal form; as, to acknowledge a deed. [ 1913 Webster ]

Syn. -- To avow; proclaim; recognize; own; admit; allow; concede; confess. -- Acknowledge, Recognize. Acknowledge is opposed to keep back, or conceal, and supposes that something had been previously known to us (though perhaps not to others) which we now feel bound to lay open or make public. Thus, a man acknowledges a secret marriage; one who has done wrong acknowledges his fault; and author acknowledges his obligation to those who have aided him; we acknowledge our ignorance. Recognize supposes that we have either forgotten or not had the evidence of a thing distinctly before our minds, but that now we know it (as it were) anew, or receive and admit in on the ground of the evidence it brings. Thus, we recognize a friend after a long absence. We recognize facts, principles, truths, etc., when their evidence is brought up fresh to the mind; as, bad men usually recognize the providence of God in seasons of danger. A foreign minister, consul, or agent, of any kind, is recognized on the ground of his producing satisfactory credentials. See also Confess. [ 1913 Webster ]

adj. Capable of being acknowledged. [ WordNet 1.5 ]

pos>adj. Generally accepted or recognized as correct or reasonable. Opposite of unacknowledged. [ Narrower terms: given, granted; unquestionable (vs. questionable) ] Also See: known.
Syn. -- accepted, recognized [ WordNet 1.5 +PJC ]

adv. Confessedly. [ 1913 Webster ]

/mhw>, n. 1. The act of acknowledging; admission; avowal; owning; confession. “An acknowledgment of fault.” Froude. [ 1913 Webster ]

2. The act of owning or recognizing in a particular character or relationship; recognition as regards the existence, authority, truth, or genuineness; a statement acknowledging something or someone. [ 1913 Webster +WordNet 1.5 ]

Immediately upon the acknowledgment of the Christian faith, the eunuch was baptized by Philip. Hooker. [ 1913 Webster ]

3. The owning of a benefit received; courteous recognition; the state or quality of being recognized or acknowledged; an expression of thanks. Shak.
Syn. -- recognition [ 1913 Webster +WordNet 1.5 ]

4. Something given or done in return for a favor, message, etc. Smollett. [ 1913 Webster ]

5. A declaration or avowal of one's own act, to give it legal validity; as, the acknowledgment of a deed before a proper officer. Also, the certificate of the officer attesting such declaration. [ 1913 Webster ]

Acknowledgment money, in some parts of England, a sum paid by copyhold tenants, on the death of their landlords, as an acknowledgment of their new lords. Cowell. [ 1913 Webster ]

Syn. -- Confession; concession; recognition; admission; avowal; recognizance. [ 1913 Webster ]

n. One who acknowledges. [ 1913 Webster ]