N/A
N/A has 2 meanings
Not applicable
When filling out forms offline or online, people may use "N/A" when the question or information does not apply to them. For example, if you are filling out your health records and there is a question asking you for your surgery history, you can add "N/A" to communicate no surgery history (the question is "not applicable" to you).
You may see N/A used in other contexts, as well. One example includes databases as a substitute for "null" as another way to say the information for the field is unknown. Another example is to comment on a procedure that you haven't overlooked a step, just that no information is applicable for that step.
Example
If you are not married, just put "n/a" where it asks for your spouse's name
Will do
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N/A is shorthand for "not available." This acronym is often used or shown in place of data, when the data is not available.
People may also send you N/A when they are not available. For example, if you ask your co-worker to meet Monday, they may send back "I'm N/A Monday. How about Tuesday?"