What is the best definition for the word "solicitous"?

The term "solicitous" is best defined as being attentive or showing concern and care for someone or something. When someone is described as solicitous, it implies that they are considerate and eager to ensure the well-being of others, often actively looking out for their needs and feelings. This quality reflects a strong sense of responsibility and compassion, making it an important trait in many contexts, such as caregiving or providing support.

In contrast, the other definitions do not align with this meaning. While "plentiful" refers to an abundance of something, "ignorant" denotes a lack of knowledge or awareness. "Stubborn" indicates an unwillingness to change one's mind or attitude. Therefore, "attentive" captures the essence of being solicitous, as it conveys the idea of mindful engagement and responsiveness to the needs of others.