flatlong

/ˈflætlɔŋ/
adverb
  1. In a flat or level position; lengthwise and flat.
    • The cat stretched flatlong on the warm pavement.
    • She placed the ruler flatlong on the paper to draw a straight line.
    • He laid the plank flatlong across the gap to make a bridge.
What does "flatlong" mean? | whatsthatwordmean | whatsthatwordmean