1. a word or phrase used to express sudden emotion or feeling, often standing alone
Usage: grammar
2. an abrupt remark made while another person is speaking; an interruption

Examples

• Oh, wow, and ouch are common interjections.
• The interjection ‘Hooray!’ showed her excitement.
• His constant interjections made it hard for her to finish her story.
• She made a brief interjection during the meeting.
• The teacher explained that interjections often end with exclamation points.
• His rude interjection interrupted the speaker’s presentation.