Yeah, when you’re physically asleep but have become conscious enough (without it having made you wake up) to have enough sense to know you’re in a dream rather than things being “for real”. Normally while dreaming you’d be semi-conscious at best, not really having the sense to do more than just go along with things. If you read around you’ll see lucid dreams often described as “hyper-real”. A goodly number of mine have been are like this, but I’ve also had very humdrum instances of lucidity as well as hyper-real episodes in dreams that were nowhere remotely lucid and I thought were just reality.