Definition of the thing
1 : the item that is the most fashionable or popular Long skirts are the thing to wear this season. It's the newest/latest thing in fashion.
2 : the fashionable or proper way of behaving, talking, or dressing It's the thing this year to buy products made from recycled materials.
3 : the reason for something OK, here's the thing: I don't have enough money to go to college. I'm sorry I didn't call you. The thing is, I've been really busy with work and school.
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