Which term denotes something that is very important and has a special meaning?

The term that denotes something very important and holding a special meaning is "important." This word directly conveys the significance of an idea, object, or event, indicating that it carries weight or value in a context. When something is described as important, it often implies that it deserves attention or consideration due to its impact or relevance.

In contrast, while "moving" refers to something that evokes strong emotions, "dramatic" relates to something that is exciting or intense, and "ironic" signifies a situation that is contrary to what is expected. These terms, while they may describe strong feelings or situations, do not inherently convey the specialized meaning or importance that "important" does.