Library / Terminal & command line / Terminal
No. 097·noun·also called command line, command prompt, console window

Terminal

A text window where you control your computer by typing commands instead of clicking.

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Definition

What it is

The terminal is an app that gives you a blank prompt and waits for you to type an instruction. You type a command, press Enter, and the computer prints back the result as text. No buttons, no menus.

Developers use it because many tools only exist there: installing code libraries, starting a local copy of an app, running tests, saving changes with Git. Coding agents use it constantly, and when they say "I ran this in the terminal" they mean they typed a command and read the output.

On a Mac the built-in app is called Terminal; on Windows it's Windows Terminal or PowerShell. When an agent shows you terminal output, the useful parts are usually the last few lines, where errors and results appear.

Say it like a builder

How to ask for it

Vague

“The black box thing said something red and it stopped.”

Precise

“I ran npm run dev in the terminal and it stopped with a red error. Here are the last 15 lines of the output. Tell me what failed and the exact command to fix it.”

Why it works

Naming the terminal, the command you ran, and pasting the actual output gives the agent the evidence it needs instead of a description of a color.

In the wild

You've seen this in

  • MThe Terminal app in a Mac's Utilities folder
  • WWindows Terminal and PowerShell
  • TThe panel at the bottom of VS Code and Cursor
  • AA coding agent showing "Ran command: npm install"
Usage note

Often confused with

ShellThe terminal is the window; the shell is the program inside it that reads and runs what you type.ConsoleThe browser console is inside Chrome and talks to a web page; the terminal is on your computer and talks to the operating system.