溜达 = 散步 散步 is more official more formal. 逛街 = go shopping 闲逛 = (somebody) go around----he has nothing to do, he just goes around to burn time.---闲逛

闲逛=溜达， 溜达是口语，闲逛是书面语，闲逛和溜达都是没有目的。 散步一般来说是有锻炼身体和放松的目的。这三个词经常可以互换。 闲逛，溜达，和散步一般指在你所在位置的周围走走，而逛街和它们有点区别，逛街一般是指去商业区购物。

“闲逛“，”逛街“，”溜达“和”散步“ 1 wander Without any purpose. 2 Go shopping or something 3 Stroll. 4 Go out for a walk.