lexical ambiguity,
polysemy the ambiguity of an individual word or phrase that can be used (in different contexts) to express two or more different meanings
ambiguity -
an expression whose meaning cannot be determined from its context
locution,
saying,
expression a word or phrase that particular people use in particular situations; "pardon the expression"
loophole a small hole in a fortified wall; for observation or discharging weapons
amphibology,
amphiboly an ambiguous grammatical construction; e.g., `they are flying planes' can mean either that someone is flying planes or that something is flying planes
Ambiguity is a condition where information can be understood or interpreted in more than one way and is distinct from vagueness, which is a statement about the lack of precision contained or available in the information. Context may play a role in resolving ambiguity. For example the same piece of information may be ambiguous in one context and unambiguous in another.
OmegaWiki Dictionary
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Ambiguity Something liable to more than one interpretation, explanation or meaning, if that meaning cannot be determined from its context.
Ambiguity The use of equivocal or ambiguous expressions, esp. in order to mislead.