The lexical ambiguity of a word or phrase applies to it having more than one meaning in the language to which the word belongs.
ðə lˈɛksɪkəl ˌæmbɪɡjˈuːɪɾi əvə wˈɜːd ɔːɹ fɹˈeɪz ɐplˈaɪz tʊ ɪt hˌævɪŋ mˈoːɹ ðɐn wˈʌn mˈiːnɪŋ ɪnðə lˈæŋɡwɪdʒ tʊ wˌɪtʃ ðə wˈɜːd bᵻlˈɔŋz.