Definitions

1. verb (past tense of ‘have’, second person singular)

used in the past tense to indicate possession or ownership of something

“You haddest the largest house on the block when I was a child.”

2. verb (archaic or poetic, second person singular of ‘have’)

used in archaic or poetic language to indicate possession or ownership of something

“Thou haddest the keys to the kingdom, but now they’re lost.”

3. noun

a verb in the second person singular past tense of ‘have’

“The grammar book explained the verb ‘haddest’ as a form of the verb ‘have’.”