1. Pertaining to love and romance: This is the most common usage of the word. When used in this way, romantic refers to feelings or behaviors that are associated with love and affection. For example, a romantic gesture might be buying flowers for your partner, or taking them on a candlelight dinner.
2. Idealistic or impractical: This usage of the word refers to something that is unrealistic or impractical, often in a charming or appealing way. For example, a romantic notion might be the idea of "true love" that lasts a lifetime, even though such relationships are often rare in real life.
3. Artistic or literary movement: Romanticism is also the name of an artistic and literary movement that emerged in the late 18th and early 19th centuries. This movement emphasized the importance of individual experience and emotion, and it often embraced a sense of wonder and awe at the natural world. Many famous works of art and literature, such as the paintings of J.M.W. Turner and the poems of William Wordsworth, are examples of Romanticism.
In general, the word "romantic" is used in a positive sense, and it often evokes feelings of love, nostalgia, and beauty.