definition of
guard

[1] #1 guard n. a person who keeps watch over something or someone. wn

[2] #2 guard v. to keep watch over; "there would be men guarding the horses". wn

[3] #3 guard v. [ward] watch over or shield from danger or harm; protect; "guard my possessions while I'm away". wn

[4] #4 guard n. the person who plays that position on a football team; "the left guard was injured on the play". wn

[5] #5 guard v. [defend, hold] protect against a challenge or attack; "Hold that position behind the trees!"; "Hold the bridge against the enemy's attacks". wn