de ‧ tach ‧ ment /dɪˈtætʃmənt/ BrE AmE noun
[ Word Family: noun : ↑ attachment , ↑ detachment ; adjective : attached ≠ ↑ unattached ≠ ↑ detached , ↑ detachable ; verb : ↑ attach ≠ ↑ detach ]
1 . [uncountable] the state of not reacting to or being involved in something in an emotional way OPP involvement
detachment from
He felt a sense of detachment from what was happening around him.
2 . [countable] a group of soldiers who are sent away from a larger group to do a special job
3 . [singular, uncountable] formal when something becomes separated from something else
detachment of
detachment of the retina