across vs straight ahead

across

adv
  • Horizontally. 

  • On the other side. 

  • From one side to the other. 

  • In a particular direction. 

noun
  • A word that runs horizontally in the completed puzzle grid or its associated clue. 

prep
  • From one side to the other within (a space being traversed). 

  • At or near the far end of (a space). 

  • across from: on the opposite side, relative to something that lies between, from (a point of interest). 

  • To, toward, or from the far side of (something that lies between two points of interest). 

  • So as to intersect or pass through or over at an angle. 

  • In possession of full, up-to-date information about; abreast of. 

  • Throughout. 

  • Spanning. 

  • On the opposite side of (something that lies between two points of interest). 

straight ahead

adv
  • directly ahead, without deviation 

How often have the words across and straight ahead occurred in a corpus of books? (source: Google Ngram Viewer )