This book is only a novel in the 'loose' sense of the word. [=the word “novel” does not usually refer to a book like this; many people would not consider the book a novel]
Ten advocacy groups from all parts of the country formed a 'loose' alliance/association/coalition to present their shared interests to Congress.
She's been 'cut loose' from her contract. [=the company/organization with whom she had a contract to work has ended the contract]
(..) it's confronted with. And, unfortunately... Let me guess. It got smart enough to wonder why it had to take orders. We lost control. Now it's loose in the jungle, threatening our facility. We've had to evacuate all personnel from the island for their own safety. How am I going in? (..)2004 The Incredibles
(..) If you came back at all... ...you'd be "back later". - Well, I'm back, okay? Is this rubble? It was just a little workout. Just to stay loose. You know how I feel about that. Darn you! We can't blow cover again. - The building was coming down anyway. - What? You knocked down a building? (..)2004 The Incredibles