The population of the species dies off during the winter months.

Many species of animals died off due to habitat destruction.

The detective is killing off all the suspects one by one.

The main character was killed off in the last episode.

The hero kills off all the villains in the movie.

Her singing was off-note and it ruined the whole performance.

Her singing was completely off-note.

She is rubbing off the dirt from her shoes.

She was caught in the act of rubbing off.

The queen shouted, 'Off with their heads!'