Sorry, no definitions found.
Sorry, no etymologies found.
Seiri means to separate needed tools, parts, and instructions from unneeded materials and to remove the latter.
And I'm pretty sure that this anime will certainly have those connotations as well, since Seiri is also a pun (physiology and/or menstruation) and it revolves around a sociology class
Wordnik is becoming a not-for-profit! Read our announcement here.