Definitions

1. noun

a person or thing that protects or defends something or someone

“The security guard at the museum was very vigilant.”

2. verb

to protect or defend something or someone

“The police guard the witness to prevent intimidation.”

3. verb

to prevent something from happening or to keep it secret

“The company guards its financial data from the public.”

4. verb

to be on duty for a specific period of time

“The police guard the road during the parade.”

5. noun

a protective device or structure

“The guard rail on the highway prevented the car from falling off the cliff.”

6. noun

a defensive position or formation

“The guard in the football game was a strong defensive line.”

7. noun

a period of time spent on duty or on guard

“He has been on guard for three hours now.”