Being "Defeated"

It had been brought to my attention that I use the word "defeat(ed)" often. As in "I ate sucky today; I'm so defeated." or "I'm defeated, I barely worked out this week at all!". So what does 'being defeated' really mean?

The actual definition says that defeat is a concrete thing. It's a loss. One side conquers while the other is defeated. It's failing to the point of not being able to try again. It's laying down and being done. Dead. Defeat is death.
I'm not dead. I am not laying down saying "I'm done. I can't go on." I have not failed so miserably at life that I do not have a second chance at ANYTHING. 

Defeat does not lay at the bottom of a cheesecake. Or a bad week. Defeat does not stalk sleepless nights and whiny children to pounce on me when it's been rough. Defeat does not hover like a grey cloud. But my use of the word does hover. It's self-sabotaging. For one little stumble, I am saying "I can't do this" and that's just not the case. I've come so far, I've learned how to pick myself back up after falling off the 'wagon' (even if it takes a little pouting first). I've surrounded myself with people who are on a similar journey and can relate and support me in my mine. I am nowhere near defeated, and I don't plan on giving up anytime soon.