His skills are second to none.

On second thought, I think I'll pass on going to the party.

I got this information second hand, so I may be wrong.

The centimeter-gram-second (cgs) system is a unit system commonly used in physics.

The second-story man broke into the house through the window.

I played a thirty-second note on the piano.

The speed of light is measured in meter-kilogram-second units.

She went on vacation to get her second wind.

The second last line of the poem was the most impactful.

The petty officer second class is responsible for training and supervising junior enlisted personnel.