Simple Definition:

Love is a feeling of strong affection or attachment towards someone or something [attachment: a deep feeling of affection or loyalty]. It can manifest in many forms, such as romantic love, familial love, and platonic love. Love involves caring for someone’s well-being and happiness, and being willing to make sacrifices for them. For example, a mother’s love for her child is often shown through her willingness to put her child’s needs before her own.

Very Simple Definition:

Love means you really like someone a lot and care about them [like: having positive feelings towards someone]. It’s when you feel happy and warm when you’re around them. For example, you might love your best friend because they make you feel good and you have fun together.