noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   The field of study of pretopological spaces (in plural for different prespaces). countable, uncountable
2. 2
   A filter subset or a preclosure operator which acts as a distinct prespace (pre-topological space). countable, uncountable

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.