The abbreviation CDF can stand for several different things depending on the context, but in many contexts, it specifically refers to "Cumulative Distribution Function" in statistics or probability theory. However, based on the options you've provided, none of those listed correspond directly to a widely recognized term associated with CDF.
If you're asking in a different context, any of the options might be an informal interpretation, but they are not standard definitions for CDF. Can you provide more context regarding the field or area you are inquiring about?