What is meant by "aplomb"?

The term "aplomb" refers to a sense of great self-confidence and poise, especially in difficult or challenging situations. When someone is said to act with aplomb, it implies they carry themselves with assurance and composure, demonstrating a strong sense of confidence in their abilities or decisions. This word often suggests a level of skill in maintaining calmness, which can be particularly impressive in stressful or demanding circumstances.

The other options do not align with the definition of aplomb; for instance, extreme nervousness conveys the opposite of self-confidence, while uncertainty in one’s actions suggests a lack of assurance and decisiveness. Similarly, a lack of preparation would indicate a deficit in confidence rather than the presence of aplomb. Therefore, the choice of great self-confidence as the definition of "aplomb" aligns perfectly with its usage in English.