*Definition [#g3a4a0dd]
A quasi-uniform space is called almost complete if every open Cauchy filter has a cluster point.
Here, "open filter" means a filter which is generated by a filter base consisting of open sets.

*Reference [#b7eeda5c]
P. Fletcher and S. Naimpally, ''On almost complete and almost precompact quasi-uniform spaces'', Czechoslovak Math. J., Vol.21 (1971), No.3, pp.383-390.