a public meeting or march(= organized walk by many people) at which people show that they are protesting against or supporting somebody/something, especially one that involves blocking a railway or road
راهبندان اعتراضی, گردهمایی اعتراضی, تجمع اعتراضی, راهپیمایی, مسدودسازی جاده, مسدودکردن راهآهن