Flag down phrasal verb transitive verb
To wave at a vehicle as a signal for the driver to stop
Would you like me to help you flag down a cab? It's going to rain.
We are trying to flag down other cars for help because our car has been suddenly out of order.
A woman was flagging down drivers to ask for a ride.
Push someone with your finger or elbow to get their attention
Take a brief, comfortable ride in a vehicle in order to test it
To communicate with someone, especially regularly.
to be in touch or communicate with somebody, primarily through telephones; to take or grasp somebody physically; to obtain one's reputation.
1. To allow passengers to get onto a ship, airplane, etc.
2. To enter a business, club, or some other group.
The verb "flag" should be conjugated according to its tense.
This phrasal verb employs the verb flag in the sense of "draw the attention of, as by waving a flag," a usage that dates back to the mid-9th century; down was added in the first part of the 20th century.