Simple Definition:

A past participle is a form of a verb that is used to form the perfect tenses in English. It is often formed by adding -ed or -en to the base form of the verb.

For example:

• The verb “walk” has the past participle “walked.”
• The verb “drink” has the past participle “drunk.”

Very Simple Definition:

A past participle is a special form of a verb that is used to talk about things that happened in the past. It usually ends with -ed or -en.

For example:

• I have walked to the store.
• She has eaten lunch.