This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

ad. to the exclusion of anything or anyone else; solely or entirely

With the exclusion of all others; without admission of others to participation.

With the exclusion of the part or parts (one or both extremes of some series, as in an account or number) mentioned; not admitting or reckoning these parts; not inclusively.

ad. without any others being included or involved

"Plus, just as many girls receive this name as boys—a potential negative if you want a name exclusively associated with boys."

conclusively    effusively