Spiny/ˈspaɪni/ Definition 1 of 3Pro Tip 1/3Physical Texture Use 'spiny' to describe objects that could physically hurt if touched. The spiny hedgehog rolled into a ball when I approached. Pro Tip 2/3Visual Imagery The word 'spiny' helps create a mental image of something with spikes. That spiny plant looks like it's from another planet. Pro Tip 3/3Nature Focus 'Spiny' is often used in the context of plants and animals in nature. Spiny leaves can be a plant's defense against predators.