definition of domainer

I checked several reputable dictionaries for a concise definition of the word 'domainer' but most redirect to 'domain', which has multiple definitions. So, since domainer is not a dictionary word, and is therefore its meaning is entirely subjective to the individual, what does 'domainer' mean to...

I checked several reputable dictionaries for a concise definition of the word 'domainer' but most redirect to 'domain', which has multiple definitions. So, since domainer is not a dictionary word, and is therefore its meaning is entirely subjective to the individual, what does 'domainer' mean to...