During the seminar, she explained how the empty set underlies many proofs in set theory.

If A and B are non-empty sets, their Cartesian product is also non-empty.

Seeing the empty base at second, the runner on first took off on the pitch.

The movers left an empty space in the garage for the new cabinets.

In combinatorics, the value of an empty product is defined to be one to make formulas consistent.

By convention, the empty sum equals zero, so adding no numbers yields the additive identity.

With a comfortable lead late in the game, the coach decided to empty the bench and give the junior varsity players some valuable playing time.

The boardroom was filled with empty suits who nodded politely but contributed nothing.

With two seconds left on the clock, he scored an empty netter to seal the victory.

The rookie scored an empty-netter in the final seconds, sending the crowd into a frenzy.