Most Significant Bit

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most significant bit

[′mōst sig′nif·i·gənt ′bit]
(computer science)
The left-most bit in a word. Abbreviated msb.

Most Significant Bit

(MSB) Bit n-1 in an n bit binary number, the bit with the greatest weight (2^(n-1)). The first or leftmost bit when the number is written in the usual way.