Definitions
There are 2 meanings of the phrase
Party Line.
Party Line - as a noun
The policy of a political group
Example: "He won in a vote along party lines"
A telephone line serving two or more subscribers
Example Sentences
"In rural areas, people used to share a party line telephone service."
"Our neighbors on the party line were always eavesdropping on our conversations."
"Back in the 1960s, it was common to have a party line where multiple households shared a phone connection."
"We had to wait for our turn to use the phone because we were on a party line."
"I overheard my neighbor gossiping about me on the party line."