Definitions

1. adjective

lacking strength or power; not firm or stable

“He’s been feeling weak after not eating for days.”

2. noun

a person or thing that is weak

“The team’s weak link is their new player.”

3. verb

to make something weak; to reduce the strength or power of something

“The cold weather weakened the plants.”

4. adverb

in a weak manner; not firmly or strongly

“He sings weakly on the off-key parts.”