The spelling of the word "outlinear" is derived from the root word "outline" and the suffix "-ar", which is commonly used to form adjectives. The pronunciation of the word can be represented in phonetic transcription as /aʊtlaɪnər/, where the emphasis is placed on the second syllable. It refers to something that is outside the norm or usual pattern, often used in statistical analysis to describe a data point that is significantly different from the rest.