Besides Meaning. Besides something or beside something means in addition to it. As an adverb besides is defined as in addition to as well.
It means at the side of or next to. Besides - making an additional point. Apart from aside from bar barring beside.
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It is rather formal. On a par with a. Apart from other than aside from but for save for not counting excluding not including except with the exception of excepting bar barring leaving aside beyond. To be in no way connected to the subject that is being discussed.
