To move from one side to another, especially by going over or through something. The deer crossed over the river to reach the other side.
To change from one activity or field to another. After years in finance, she decided to cross over into teaching.
To blend or merge different styles or genres, especially in music or entertainment. The band crossed over from rock to pop with their latest album.
To pass from one phase or condition to another. The project crossed over from planning to execution last month.
To move or pass from one side, place, or condition to another, especially by traversing a boundary or barrier. The hikers were crossing over the river using a narrow wooden bridge.
In genetics, to exchange genetic material between homologous chromosomes during meiosis, resulting in genetic variation. During meiosis, the chromosomes are crossing over, which increases genetic diversity in the offspring.
To transition from one field, activity, or genre to another, often referring to artists or professionals. The country singer is crossing over into pop music with her latest album.