a high-speed passenger train
"The sleek bullet hurtled through the countryside at record speeds, connecting distant cities in just minutes."
A projectile, usually of metal, shot from a gun at high speed.
"The rancher named his new steer Bullet because he was just a small, energetic bull calf."
A young or little bull; a male calf.
In plain English: A bullet is a small, hard projectile fired from a gun that flies through the air to hit its target.
"The detective found an empty bullet casing on the floor near the window."
Usage: Use "bullet" primarily to refer to the small, hard projectile fired from a firearm rather than its bullet-shaped shape in other contexts. When describing text formatting, specify that you are adding graphic markers instead of using this word for the items themselves.
To draw attention to (text) by, or as if by, placing a graphic bullet in front of it.
"The presenter decided to bullet the key takeaways from her report so the audience could easily follow along."
In plain English: To bullet something means to add small dots as bullets at the beginning of each line in a list so it stands out more clearly.
"The news bullet announced that the company had filed for bankruptcy early in the morning."
The word comes from the Old French bullete, a small form of boule meaning "ball." It originally referred to an official identification badge before taking on its modern sense.