The correct spelling of the phrase "be out line" is actually "be outline". The IPA phonetic transcription for this word is /bi ˈaʊtlaɪn/. The "be" is pronounced with a short "e" sound and the stress is on the second syllable. "Outline" is spelled with a silent "e" at the end, pronounced with a long "i" sound followed by an "n". It means to briefly describe or explain the main points or shape of something. So, next time you spell this phrase, make sure to include all the letters!