Noun

(wikipedia entanglement) (en noun)

The state of being entangled; intricate and confused involution.

That which entangles; intricacy; perplexity.

Specifically, in fortification, an obstruction placed in front or on the flank of a fortification, to impede an enemy's approach.

Noun

(en noun)

An instance of moving to live in another place for a while.

Seasonal moving for animals, birds or fishes to breed or find a new home.

* {{quote-magazine, date=2013-01-01

, author=Paul Bartel, Ashli Moore , title=Avian Migration: The Ultimate Red-Eye Flight , volume=101, issue=1, page=47–48 , magazine= citation , passage=Many of these classic methods are still used, with some modern improvements. For example, with the aid of special microphones and automated sound detection software, ornithologists recently reported […] that pine siskins (Spinus pinus ) undergo an irregular, nomadic type of nocturnal migration .}}

Movement in general.

The migration of lead from a can to the food inside it can cause lead poisoning.

(computing) Instance of changing a platform from an environment to another one.