Brilliant business name based on the word "define".
The name "definely" has eight letters and three syllables. Successful brands using three syllable names include Heineken, KFC and Nescafé.
Definely.com is a dot com domain. Dot com domains are the most valued domain extension in the world, used by famous websites like twitter.com. Once you own a dot com, it will be much easier to rank for your own name in Google.