Brilliant business name based on the word "define".
Definely has eight characters and three syllables. Examples of three popular syllable names include Adidas, Armani and Mastercard.
Definely.com is a .com domain. Dot com domains are the most valuable domain extension in the world, famously used by websites like twitter.com. Once secured, a .com all but guarantees no-one else can outrank you for your own name in the long run.