in·cur·sion /ɪnˈkɜːʃən/ n. 1. 进入；流入 His one incursion into politics was not a success. 他唯一的一次涉足政界全无建树。 an incursion of disease 疾病的传入 the inevitable incursion of new techniques 不可避免的新技术的涌入 2. 侵入；袭击；侵犯 They strengthened their northern border against any possible incursions by guerrilas. 他们加强了北方边界以防游击队的侵犯。 Dikes protected the lowland from incursions of the sea. 堤坝保护低地不受海水侵袭。 All this extra work makes incursions on my free time. 所有这些额外工作占用了我的闲暇时间。