prep

• At or to the back or far side of.
  "Behind the smile was a cruel intention."
• At or to the back or far side of.
  "All my problems are behind me."
• (sometimes regarded as nonstandard, US, informal) Following, subsequent to; as a result or consequence of; because of.
  "He was like, 'Fuck the police! Fuck you! You know who I am, you gonna quit playing with me, bitch.' I'm like let's go. 'Cause I wasn't trying to go to jail behind that shit."

adv

• (archaic) Not yet brought forward, produced, or exhibited to view; out of sight; remaining.
  "We cannot be sure that there is no evidence behind."

adj

• (of a watch or clock) Slow.
  "My watch is behind by four minutes."

noun

• (informal) The buttocks, bottom, butt.
  "I was stung on the behind by a wasp."
• (Australian rules football) A one-point score.
  "A roar from ten thousand throats go up, For we've kicked another behind."
• (baseball, slang, 1800s) The catcher.