Definition: Okay, let me try to figure out how to define "definitely" in two sentences. First, I need to make sure I understand what the user is asking for. They want the word defined in two clear sentences. I know that "definitely" means with certainty or without doubt, so first sentence could be explaining its meaning as a certainty. Maybe something like "Definitely, it's certain." Then, the second sentence could provide an example to illustrate its usage. For instance, "If you're sure about something, use 'definitely'." Wait, but maybe I should check if that covers both parts of definition. The first sentence defines the word, and the second gives an example. That seems good. Let me make sure there are no errors. Yes, that's two clear sentences. Alright, that should do it. Definitely means with certainty or without doubt. It conveys strong, certain opinions or decisions. For example, "She definitely knows the answer."

definetiredly