She wore a skirt that reached 'below' her knees. = The bottom of her skirt was 'below' her knees.
The temperature ranged from 5 'below' to 10 above. [=from −5 degrees to 10 degrees Fahrenheit]
That remark was 'below the belt'. = That remark really 'hit' (him) 'below the belt'.
(..) I'm watching over you, Will. You're a pirate. Has he said anything? His name's William Turner. That's all I found out. Take him below. GOV.SWANN: Elizabeth? Are you all right? Are you decent? Yes. (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl
(..) to the powder magazine. And the rest of you, bring me that medallion! Help! Hey! Below! Thanks very much. Jack! Bloody empty. Aaah! That's not very nice. (..)2003 Pirates of the Caribbean: The Curse of the Black Pearl
(..) Hey. - Could you stay with the tour? - Yeah. Thank you. The White House is big. Including below-ground levels, it's six storeys tall... ...with rooms, doors, windows, fireplaces... ...and bathrooms. The grounds contain a tennis court, (..)2013 White House Down