Definitions

1. noun

a unit of time equal to one sixtieth of a minute

“The timer went off after one second.”

2. noun

the number two in a series or order

“This is the second book in the series.”

3. adjective

occurring or coming second in a series or order

“The second-place finisher received a trophy.”

4. verb

to place or put something in second position

“The judge decided to second the runner-up.”

5. verb

to support or show approval of something

“I second the motion to adopt the new policy.”