What counts as a Lucid Dream?

[Jhony]

I've been thinking about it today. I mean can you count being lucid for a moment a lucid dream? Or would it be more of a lucid moment? How long can your lucidity be before it is classified as a "lucid dream" or instead of that what classifications must it be to be a "lucid dream"? Or do you not use lucid moment at all and just call every time you lucid a lucid dream. For example, I had my first so called "lucid dream" last night (DILD). I wasn't lucid at the beginning but later on I realized what had happen around me and I become lucid. What felt like a few minutes as I tried to get in control (my vision was blurry). After that the dream ended and I had a brief moment of regular dreaming before waking up. So would that small period of time of being lucid count as a lucid dream?