A term used in linguistics to refer to a construction with more than one grammatical interpretation in terms of constituent analysis. A much-used example is old men and women, which is structurally ambiguous: it may be analysed as [old men] and women (i.e. only the men are old) or old [men and women] (i.e. both the men and women are old). In generative grammar, this phenomenon is sometimes referred to as ‘constructional homonymity’.
語言學用來指一個構式在組構成分分析上有不止一種語法解釋。一個經常引用的例子是old men and women“年老的男人和女人”，其“結構歧義”表現在既可分析為[old men] and women“[年老的男人]和女人”（即只有男人年老），也可分析為old [men and women]“年老的[男人和女人]”（即男人和女人都年老）。生成語法中，這種現象有時稱作“同形異構”。