adj

• (of a path, trajectory, etc.) Direct, undeviating.
  "Now, as the world knows, the straightest way to the heart of the honest voter is through the women of the land, and the straightest way to the heart of the women is through the children of the land; and one method of winning both, with rural politicians, is to kiss the babies wide and far."
• (cricket) Describing the bat as held so as not to incline to either side; on, or near a line running between the two wickets.
  "Steyn continues and it's all a bit more orderly down his end as O'Brien defends the first three balls with a straight bat and a respectful dip of the head."
• (engineering, of an internal-combustion engine) Having all cylinders in a single straight line; in-line.
• (tennis) Describing the sets in a match of which the winner did not lose a single set.
  "Murray started well against Marcos Baghdatis before slumping to defeat in straight sets and the British No1 admitted he may not have been mentally prepared for the rigours of the ATP Tour after a gruelling start to 2011."

noun

• (poker) Five cards in sequence.
• (colloquial) A heterosexual.
  "My friends call straights "heteros"."
• (slang) A normal person; someone in mainstream society.
  "You live with straights who tell you you was king / Jump when your momma tell you anything"
• (slang) A cigarette, particularly one containing tobacco instead of marijuana.
  "A straight = a straighter = a straight cut, une cigarette en tabac de Virginie.]"

verb

• (transitive) To straighten.
  "One man draws out the wire , another straights it , a third cuts it , a fourth points it , a fifth grinds it at the top for receiving the head"