flyer

Pronunciation: /ˈflaɪə(ɹ)/

The English word “flyer” has 18 meanings listed here.

noun

That which flies, as a bird or insect.
A machine that flies.
An airplane pilot.
A person who travels by airplane.
A leaflet, often for advertising.
The part of a spinning machine that twists the thread as it takes it to and winds it on the bobbin
An arch that connects a flying buttress into the structure it supports.
A person who is lifted and/or thrown by another person or persons.
A stray shot away from the group on a target.
A standard rectangular step of a staircase (as opposed to a winder).
A female kangaroo; a roo; a doe; a jill.
A leap or jump.
A risky investment or other venture.
A fast-moving person or thing.
A false start.
Synonym of flying cymbal.

From fly + -er (agent noun suffix). With regard to the sense "female kangaroo": because of the high speed at which they move.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.