to the degree that.

As far as I know, he isn't coming to the party.

The city once went so far as to threaten to shut off the building's water supply.

Related vocabulary: as far as possible, as far as something goes

Etymology: based on the literal meaning of as far as (= the same distance as)

• in the business of doing something
• in the can
• in the cards
• in the catbird seat
• in the clear
• in the closet
• in the cold light of day
• in the cross hairs
• in the dead of night
• in the dead of the night
• in the dead of winter
• in the doghouse
• in the doldrums
• in the driver's seat
• in the dumps
• in the end
• in the event of
• in the event of something
• in the eyes of
• in the eyes of someone
• in the eyes of the law
• in the face of
• in the face of something
• in the family way
• in the fast lane