Top Definition
A chinese counting machine. Now outdated, has been banished to preschools and daycare centers for childrens entertainment. Sometimes considered, in its most basic form, the first computer.

Consists of 5 horizontal bars, each holding a number of beads that slide back and forth.
The little girl pushed the beads on the abacus from one side to the other.
by QueenSammich April 30, 2005
5 more definitions
A primitive calculator used by both old people and technophobes.
Oh my god it runs on batteries, I'll stick to the good old abacus.
by Jimothjim April 19, 2006
a tool used by the Chinese in the early times. An abacus can be used to do arithmetic by hand.
"Quinn used an abacus to count to 100."
by Kasey!! and Quin!! June 21, 2008
Noun. Someone who is really good at maths.
"134+4765=4899"
"John, all I can say is you're an abacus!"
by Dylan Hewson April 21, 2005
An instrument used to calculate numbers and other mathematical problems, which is 10 times better and faster than calculator.
Abacus vs. Calculator, who wins?
Abacus, of course!
by Le Mao September 11, 2012
a tool used by the Chinese in the early times. An abacus can be used to do arithmetic by hand.
"Quinn used an abacus to count to 100."
by Kasey!! and Quin!! June 21, 2008

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