sudden infant death syndrome

(linguistics) a specific historical consonantal shift of the Japanese language during the Heian Period, wherein many word-medial /f/ sounds changed to /w/ sounds

pedestrian-only street, pedestrian mall

(literally) above heaven and under heaven / (figuratively) the whole world or universe

(Chinese mythology, Japanese mythology) the beginning of the world; when the world began; when the world was created

an Emperor or Empress (regnant) of Japan / (usually in Chinese contexts) an emperor, ruler, or other monarch with a heavenly mandate

exhibition

(astronomy) radio astronomy

astronomical (relating to astronomy) / astronomical (vast)

used for "spaces" in transcriptions, or as other separators