Blur from being out-of-focus, and blur caused by a subject in motion, can be easily confused.
Blur from being out-of-focus is often soft.
Blur from movement, recorded with a slow shutter speed, may be streaky, or there may be a doubling of the edges of the subject.
The photograph below has blur from being out-of-focus.
In the next photograph, the tips of the grass have blur because it was windy and a slow shutter speed was used (1/25th of a second).
If there had been no wind, or if a faster shutter speed had been used, the tips of the grass would have looked sharp.
The camera was on a tripod.
If it had been hand held, there would have been camera shake.
The grass, trees, and everything else in the picture, would have been blurry.