Entanglements meaning : The state of being entangled; intricate and confused involution. That which entangles; intricacy; perplexity. An obstruction placed in front or on the flank of a fortification, to impede an enemy's approach. An obstruction of cables and spars across a river or harbour entrance. A quantum mechanical phenomenon in which the quantum states of two or more objects have to be described with reference to each other, even though the individual objects are spatially separated.