Interjection/ˌɪntərˈdʒekʃn/ Definition 1 of 2Pro Tip 1/3Express Emotions Interjections allow you to express feelings like surprise or joy more vividly. Yay! I passed my driving test! Pro Tip 2/3Stand Alone Often used on their own, interjections can be a complete response. Oops! That wasn't supposed to happen. Pro Tip 3/3Conversational Tone Use interjections to make your speech sound more natural and conversational. Well, I think it's time to start.