1.
kind; type; sort; category
A group of things sharing common characteristics. Used as a standalone noun or as a suffix attached to other nouns to indicate a category or class.
Usage
As a suffix, 類 attaches to nouns to create category labels: 魚類 (fish, as a category), 野菜類 (vegetables), 肉類 (meats). This usage is common in menus, nutrition labels, and classification systems.
As a standalone noun, 類 means "kind" or "sort": この類の... (this type of...), 類を見ない (unparalleled).