The idiom "to be someone's one and only" means to be the only person that someone loves or cares about romantically. It is often used to describe a deep and exclusive romantic relationship where one person is the sole focus of the other's affections.
For example, if someone says "she's my one and only," they mean that they love and are committed to only that person and no one else. This phrase is commonly used in love songs, romantic movies, and in everyday conversations between couples.
It is important to note that this phrase is typically used in a romantic context and not in a platonic or familial relationship. It is also important to use this phrase with caution as it can be seen as possessive or controlling in some situations.
• As a mother, my daughter is my one and only priority. (intermediate level)
• After dealing with so many people, she found her one and only genuine friend. (advanced level)
• She is my one and only friend in this new town. (beginner level)
• She is the one and only person I trust with all my secrets. (proficient level)
• He promised me that I am his one and only love. (elementary level)
• I am looking for someone who will be my one and only partner for life. (upper-intermediate level)