Seedling/ˈsiːdlɪŋ/ Definition 1 of 2Pro Tip 1/3Botanical Term Used mainly in gardening or biology to refer to young plants. The botanist explained how to care for a seedling until it matures. Pro Tip 2/3Metaphorical Use Can be used metaphorically to refer to the beginning stage of anything. Her project was just a seedling, with much work needed before completion. Pro Tip 3/3Nurturing Required Implies something needs care, like a young plant needs sunlight and water. Ensure your seedlings get enough nutrients to grow strong.