Anarcho-syndicalism (n.) is a conception of a very organized society, but organized from below by direct participation at every level, with as little control and domination as is feasible, maybe none.
Anarcho-syndicalism (n.) is a variety of anarchism concerned primarily producing a free and democratic society through control over work, over the work place, over production... that is, working people ought to control the enterprises in which they work, along with communities, so they should be associated with one another in free associations.
Anarcho-syndicalism (n.) is grounded in the notion that a free society requires that working people control their own work, its conditions, and the enterprises in which they work in communities of free associations.
Anarcho-syndicalism (n.) is roughly what you get by applying classical liberal principles to the age of the corporation — and revolutionary Barcelona came closest to living it.
Anarcho-syndicalism (n.) puts industrial organization where government used to be, and has the workers' unions build the facts of the future society inside the old one.