get down in WordNet English dictionary

1. take the first step or steps in carrying out an action
   "We began working at dawn"; "Who will start?"; "Get working as soon as the sun rises!"; "The first tourists began to arrive in Cambodia"; "He began early in the day"; "Let's get down to work now"
   get down  begin  get  start out  start  set about  set out  commence 
   
2. move something or somebody to a lower position
   "take down the vase from the shelf"
   lower  take down  let down  get down  bring down 
   
3. lower someone's spirits; make downhearted
   "These news depressed her"; "The bad state of her child's health demoralizes her"
   depress  deject  cast down  get down  dismay  dispirit  demoralize  demoralise 
   
4. alight from (a horse)
   unhorse  dismount  light  get off  get down 
   
5. put down in writing; of texts, musical compositions, etc.
   write down  set down  get down  put down 
   
6. pass through the esophagus as part of eating or drinking
   "Swallow the raw fish--it won't kill you!"
   swallow  get down 
   
7. lower (one's body) as by kneeling
   "Get down on your knees!"
   get down 
   

get down in English Wiktionary