Simple Definition:

A participle is a verb form that can be used as an adjective or to form different verb tenses. When used as an adjective, it describes or gives more information about a noun. When used to form verb tenses, it combines with helping verbs to show actions that have happened in the past, are happening in the present, or will happen in the future.

Examples:

• The running water flowed down the river. (adjective: describes the noun “water”)
• He has eaten his dinner. (verb tense: combines with the helping verb “has” to show a completed past action)

Very Simple Definition:

A participle is a special verb form that can be used as a describing word or to show when something happened.

Examples:

• The chosen movie was fun to watch.
• He has eaten his dinner.