Definitions

1. verb

to refuse or decline something, especially a gift or invitation, often because of a past disagreement or injury

“She welched on her promise to help us move.”

2. noun

a refusal or failure to pay a debt or fulfill an obligation

“The business was sued for welch on its loan.”

3. verb

to decline or refuse something, especially a challenge or invitation

“He welched on the dare to eat the spicy food.”