Select the option that best expresses the meaning of "SINE DIE."

For an indefinite period

The correct answer is Option (1) - For an indefinite period

The best option that expresses the meaning of "SINE DIE" is:  For an indefinite period

"Sine die" literally translates to "without a day" in Latin.
It indicates that something is postponed or adjourned without setting a specific date to resume.