1. praising an agreement between two or more people (and creating solidarity)
great minds think alike
When you say 'great minds think alike' it means when two people have the same idea or make the same choice. You might say 'great minds think alike' if your colleague makes a suggestion that you were also about to make, for example. You use this idiom to express that two people have a great thought at the same time because they think in a similar way. This is an idiom used in social and professional contexts.