What does a cross product of 0 mean?

Cross Product of vectors:
Cross product, often known as a vector product, is denoted $\overrightarrow{A}\times \overrightarrow{B}=AB\sin \widehat{{\theta }_{\eta }}$ represent magnitude of vectors, $\eta$ is unit vector and and $\theta$ is angle between the vectors.
1. If the cross product of two vectors is zero then
The vectors are perpendicular to one another or their angle is an even ${90}^{\circ }$.
2. The vectors are either both zero vectors or just one of them.
As a result, the meaning of the cross product is zero.