"Also fool" is not a common term or a recognized phrase in the English language. As such, there is no standard dictionary definition available. It is possible that "also fool" is a typographical error or an incomplete term.
If you intended to refer to the phrase "a fool also" or "also a fool," it may be understood as an idiomatic expression indicating that an individual is both irresponsible or lacking in judgment and is additionally behaving foolishly. This phrase suggests the person in question is not only lacking in wisdom or intelligence but is also engaging in actions that further emphasize their foolishness.
However, without further context or clarification, it is difficult to provide a more precise definition. If "also fool" is a specific term, slang, or phrase used within a specific context or community, additional information would be needed to provide an accurate definition.