1.  ambiguity(n = noun.communication) - an expression whose meaning cannot be determined from its context;
is a kind of expression, locution, saying
has particulars: loophole, amphibology, amphiboly, parisology, double entendre
Derived forms adjective ambiguous₁, adjective ambiguous₃

2.  ambiguity(n = noun.attribute) equivocalness - unclearness by virtue of having more than one meaning;
is a kind of unclearness
has particulars: equivocation, evasiveness, prevarication, lexical ambiguity, polysemy, no man's land, twilight zone
Antonym: unambiguity
Derived forms adjective ambiguous₂, adjective ambiguous₁

   The quality or state of being ambiguous; doubtfulness or uncertainty, particularly as to the signification of language, arising from its admitting of more than one meaning; an equivocal word or expression. [1913 Webster]
"No shadow of ambiguity can rest upon the course to be pursued." [1913 Webster]
"The words are of single signification, without any ambiguity." [1913 Webster]

ambiguity, n. (pl. -ies)
1 a a double meaning which is either deliberate or caused by inexactness of expression. b an example of this.
2 an expression able to be interpreted in more than one way (e.g. dogs must be carried).

Etymology:
ME f. OF ambiguit{eacute} or L ambiguitas (as AMBIGUOUS)

N  obscurity, involution, hard words, ambiguity, unintelligibleness, vagueness &c, inexactness, what d'ye call 'em, darkness of meaning, obscure, crabbed, involved, confused.

N  uncertainty, incertitude, doubt, doubtfulness, dubiety, dubitation, dubitancy, dubitousness, hesitation, suspense, perplexity, embarrassment, dilemma, bewilderment, timidity, vacillation, diaporesis, indetermination, vagueness, haze, fog, obscurity, ambiguity, contingency, dependence, dependency, double contingency, possibility upon a possibility, open question, onus probandi, blind bargain, pig in a poke, leap in the dark, something or other, needle in a haystack, needle in a bottle of hay, roving commission, precariousness, fallibility, uncertain, casual, random, changeable, doubtful, dubious, indecisive, unsettled, undecided, undetermined, in suspense, open to discussion, controvertible, in question, vague, indeterminate, indefinite, ambiguous, equivocal, undefined, undefinable, confused, mystic, oracular, dazed, perplexing, enigmatic, paradoxical, apocryphal, problematical, hypothetical, experimental, unpredictable, unforeseeable (unknowable), fallible, questionable, precarious, slippery, ticklish, debatable, disputable, unreliable, untrustworthy, contingent, contingent on, dependent on, subject to, dependent on circumstances, occasional, provisional, unauthentic, unauthenticated, unauthoritative, unascertained, unconfirmed, undemonstrated, untold, uncounted, in a state of uncertainty, in a cloud, in a maze, bushed, off the track, ignorant, afraid to say, out of one's reckoning, astray, adrift, at sea, at fault, at a loss, at one's wit's end, at a nonplus, puzzled, lost, abroad, d_esorient_e, distracted, distraught, pendente lite, sub spe rati, Heaven knows, who can tell? who shall decide when doctors disagr.

N  unintelligibility, incomprehensibility, imperspicuity, inconceivableness, vagueness, obscurity, ambiguity, doubtful meaning, uncertainty, perplexity, spinosity, obscurum per obscurius, mystification, latency, transcendentalism, paradox, oxymoron, riddle, enigma, puzzle, diagnus vindice nodus, sealed book, steganography, freemasonry, pons asinorum, asses' bridge, high Dutch, Greek, Hebrew, jargon, unintelligible, unaccountable, undecipherable, undiscoverable, unknowable, unfathomable, incognizable, inexplicable, inscrutable, inapprehensible, incomprehensible, insolvable, insoluble, impenetrable, illegible, as Greek to one, unexplained, paradoxical, enigmatic, enigmatical, puzzling (secret), indecipherable, obscure, dark, muddy, clear as mud, seen through a mist, dim, nebulous, shrouded in mystery, opaque, dense, undiscernible, misty, hidden, latent, indefinite, garbled, perplexed, undetermined, vague, loose, ambiguous, mysterious, mystic, mystical, acroamatic, acroamatical, metempirical, transcendental, occult, recondite, abstruse, crabbed, inconceivable, inconceptible, searchless, above comprehension, beyond comprehension, past comprehension, beyond one's depth, unconceived, inexpressible, undefinable, incommunicable, unpredictable, unforeseeable, it's Greek to me.

N  equivocalness, double meaning, ambiguity, double entente, double entendre, pun, paragram, calembour, quibble, equivoque, anagram, conundrum, play on words, word play, homonym, homonymy, amphiboly, amphibology, ambilogy, ambiloquy, Sphinx, Delphic oracle, equivocation, white lie, mental reservation, paltering, equivocal, ambiguous, amphibolous, homonymous, double-tongued, enigmatical, indeterminate, on the one hand, on the other hand.

lexical ambiguity, without ambiguity