a device or layer that removes unwanted substances or parts from liquid, air, light, or sound as they pass through
She poured the coffee through a paper filter to catch the grounds.
The air conditioner has a dust filter that needs cleaning.
to pass a substance, light, or sound through a filter so that unwanted parts are removed
Campers filter water from the stream before drinking it.
These sunglasses filter out harmful UV rays.
a computer tool or setting that only lets certain information, messages, or results appear while hiding the rest
The spam filter automatically moved junk emails to another folder.
Set a price filter on the shopping site to see only affordable items.
to move or spread slowly in small numbers or amounts
Light filtered through the curtains at dawn.
Guests began to filter into the hall before the concert.
