Definitions

1. superlative adjective

superlative form of glad, used to compare three or more things and to indicate the greatest degree of gladness

“He was the gladdest person in the room when he heard the news.”

2. adverb

used to intensify the meaning of glad, indicating a high or extreme degree of gladness

“She was gladdest to see her friends after such a long time apart.”

3. noun

a person or thing that is the most glad, often used in a humorous or ironic manner

“The saddest person at the party was actually the gladdest, because they were glad to be there.”