Select the most appropriate meaning of the given idiom.

At the eleventh hour

At the very last minute

The most appropriate meaning of the idiom "at the eleventh hour" is (3) At the very last minute.

The other options do not fit the meaning of the idiom.

• One hour before midnight is 11:59 p.m.
• At 11:00 p.m. is still within the hour, not the very last minute.
• At 11:00 a.m. is in the morning, not at night.

The idiom "at the eleventh hour" is used to describe something that happens very close to the deadline or the very last minute. It is often used to describe someone who does something at the last minute, or to describe something that happens unexpectedly.