filter4d[intransitive] + adv.prep. (of people) to move slowly in a particular directionThe doors opened and people started filtering through. [intransitive] + adv.prep. (of information, news, etc.) to slowlyAn overview of Filtered Historical Simulation (FHS) By Giovanni Barone-Adesi & Kostas Giannopoulos. FHS is a scenario generating technique for speculative assets prices (risk factors).