The term BI-PLUS ONE is a combination of two words, 'BI' and 'PLUS ONE'. BI stands for 'Business Intelligence', which is the process of collecting, analyzing, and interpreting data to make informed decisions. PLUS ONE refers to the addition of ONE more element to the data set, such as an additional variable or factor. This combination of terms is often used in the context of data analysis, where the addition of ONE more element can provide valuable insights into the data.