upper world; heaven; superkingdom
Refers to the realm above the human world in religious or mythological contexts; also used in biology for the taxonomic rank superkingdom (domain).
upper bound
Mathematical term for the least upper bound or a value that is greater than or equal to every element in a set.
The upper bound of this sequence is 10.
In Buddhism, the upper world is considered the realm where gods and enlightened beings dwell.
In biological classification, superkingdom is a rank above kingdom.