[flaghacker]

It means that instead of (only) doing convolution in spatial dimensions, it also(/instead) happens in the temporal dimension.

A good resource for the "instead" case: https://unit8.com/resources/temporal-convolutional-networks-...

The "also" case is an example of 3D convolution, an example of a paper that uses it: https://www.cv-foundation.org/openaccess/content_iccv_2015/p...