service line

American  

noun

1. Tennis. the rear boundary of a service court.

2. a line running parallel to the front wall in certain court games, as handball or squash, that marks a boundary of the service area.

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service line British  

noun

1. the line at the back of the court behind which the server must stand when serving

2. a line indicating the boundary of a permissible service, as on the backwall of a squash court

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Etymology

Origin of service line

First recorded in 1870–75

Example Sentences

Somewhere on that paperwork will be a number to call — ideally for a life insurance agent who sold the policy to your parents, but it may be a more generic customer service line.

From Salon • Mar. 24, 2026

When Brad Collett heard about Citi’s new Strata Elite credit card—with perks like airport lounge access and a dedicated service line for top-tier customers—he decided to splurge on his first premium card.

From The Wall Street Journal • Oct. 16, 2025

"For instance, for lead, guided waves along the pipe are slower since lead bulk wave speeds are much lower than speeds of other service line materials."

From Science Daily • Mar. 7, 2024

Safety investigators determined that UGI replaced a service line at the Palmer plant in 2021, but kept the 1982 service tee connected to the system and fully pressurized.

From Seattle Times • Jul. 18, 2023

I work my way through the menus and get to the consumer merchandise customer service line.

From "Things Not Seen" by Andrew Clements