Under/ˈʌndər/ Definition 1 of 5Pro Tip 1/3Hidden Objects Use 'under' to imply something is concealed or obscured by what's above it. She found her keys under a pile of clothes. Pro Tip 2/3Shelter or Shade 'Under' can indicate a position that provides protection or refuge from above. We sat under a canopy to avoid the sun. Pro Tip 3/3Lower Position Describes one object being at a lower level than another, often implying hierarchy. The captain's quarters are under the main deck.