*Definition [#q3a8c570]
-A topological space (X,τ) is said to be almost-regular if for each point x in X and each regularly closed set A not containing x, there exist disjoint open sets &ref(http://www.eaflux.com/imgtex/imgtex.fcgi?%5bres=100%5d%7b%5c%5b%20U_x%5cmbox%7b%20and%20%7dU_A%20%5c%5d%7d%25.png); such that &ref(http://www.eaflux.com/imgtex/imgtex.fcgi?%5bres=100%5d%7b%5c%5b%20x%5cin%20U_x%5cmbox%7b%20and%20%7dA%5csubset%20U_A%20%5c%5d%7d%25.png);.


*Reference [#j175e73a]
-Singal, M. K.; Prabha Arya, Shashi, ''On almost-regular spaces.'' (Serbo-Croatian summary), Glasnik Mat. Ser. III 4 (24) 1969 89–99.