totality

noun, plural to·tal·i·ties.

1. something that is total or constitutes a total; the total amount; a whole.
2. the state of being total; entirety.
3. Astronomy. total obscuration in an eclipse.

noun plural -ties

1. the whole amount
2. the state of being total
3. the state or period of an eclipse when light from the eclipsed body is totally obscured

n.

1590s, from total (adj.) + -ity. In the eclipse sense, from 1842.