Brilliant business name based on the word "define".
The name "definely" has eight characters and three syllables. Established brands using three syllable names include Delicious, Heineken and Sainsbury's.
Definely.com is a dot com domain. Dot com domains are the most sought after top-level-domain 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.