noun
gizmo
GIHZ-moh
noun
1
A small device or gadget, especially one whose name or purpose isn't known.
"What does this little gizmo on the dashboard actually do?"
How to Use Gizmo
Learner’s notesIn plain EnglishA casual word for any small device, especially one you can't name.
When to use it
Informal — fine in conversation, avoid in formal technical writing.
Word Forms
gizmos plural
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What does this little _____ on the dashboard actually do?
Etymology
Origin unknown; entered American English slang in the early 20th century.