ab ‧ sorp ‧ tion /əbˈsɔːpʃ ə n, -ˈzɔːp- $ -ɔːr-/ BrE AmE noun [uncountable]
1 . a process in which something takes in liquid, gas, or heat
the body’s absorption of iron
2 . a process in which people or things become part of something larger
the absorption of Soviet immigrants into Israel
3 . when you are very interested in something
I don’t understand James’ absorption with military history.