Indeed/ɪnˈdiːd/ Definition 1 of 5Pro Tip 1/3Agreement Reinforcement Use 'indeed' to strengthen a statement or agree with someone emphatically. He is a brilliant scientist, indeed. Pro Tip 2/3Supporting Evidence 'Indeed' can precede a fact or example that supports a previous statement. The book is popular; indeed, it's a bestseller. Pro Tip 3/3Warm Acknowledgement Use 'indeed' to acknowledge what someone said as true, often with a sense of shared understanding. Yes, indeed, that's a valid point.