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.