Definition of break down into
1 : to separate (something) into (simpler substances) Water can be broken down into hydrogen and oxygen through electrolysis.
2 : to become separated into simpler substances Water can break down into hydrogen and oxygen through electrolysis.
3 : to divide (something) into (parts or groups) The report is broken down into three sections.
4 : to be able to be divided into parts or groups The report breaks down into three sections.
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