Brilliant business name based on the word "define".
Definely has eight characters and three syllables. Three syllable names are used by established brands like Heineken, Microsoft and Adobe.
Definely.com is a dot-com domain. Dot com domains are the most prestigious domain extension in the world, used by famous websites like twitter.com. When you own a dot-com, it is much easier to rank for your own name in search engines.