Posable means able to be positioned or arranged in different ways. A posable action figure has joints at the shoulders, elbows, hips, and knees that let you move its arms and legs into various poses. You might position a posable superhero figure in a flying pose, a fighting stance, or sitting down.

The opposite would be a solid plastic figure that can't move at all: it stays in one fixed position. Posable toys are more fun because you can create different scenes and stories. An artist might use a small posable wooden mannequin to help draw people in different positions. Some posable figures have so many joints they can recreate almost any human movement, while others might only bend at a few places.

When a photographer asks you to pose for a picture, they want you to arrange yourself in a specific position. A posable toy simply means you can pose it in different ways.