To transition from an open state to a closed state, resulting in something being inaccessible or sealed off, such as doors, gates, or containers.

To become taut or firm, indicating a lack of looseness in physical form, such as muscle tone or the condition of something neatly secured.

To reach a conclusion or finish, marking the end of an activity or operation, as in businesses or meetings closing for the day.

To strengthen one's determination or mindset, often associated with a sense of seriousness or focus in preparation for a challenge or responsibility.

To exhibit a strict or disciplined condition, particularly in the context of maintaining order or frugality in behavior or atmosphere.