Although the semantic variation in Nigerian English (NigE) is the object of numerous publications, none has based its discussion on entries from dictionaries of Nigerian English. This paper fills this gap by using data from two dictionaries of NigE with the aim of showing that the socio-cultural milieu and experiences of Nigerians influence the meanings of some English words resulting in extension or outright differences in the meanings of some English words as entered in native English dictionaries. The semantic variations affirm that the socio-cultural realities of Nigeria converge against the idea of having the British or the American variety as the standard for measuring Nigerians competence in English. The paper stresses that these semantic variations are marks of creativity, dynamics of socio-cultural acculturation and nativization that result in linguistic variation among varieties of English and awareness and acceptance of the semantic variations in NigE as variant forms would result in