Meaning : Down to defeat, death, or ruin.
							Example : 
							Their competitors went under.
							
Meaning : Through a range downward.
							Example : 
							Children six and under will be admitted free.
							
Meaning : Into unconsciousness.
							Example : 
							This will put the patient under.
							
Meaning : In or into a state of subordination or subjugation.
							Example : 
							We must keep our disappointment under.
							
Meaning : Below some quantity or limit.
							Example : 
							Fifty dollars or under.
							
Meaning : Below the horizon.
							Example : 
							The sun went under.
							
Meaning : Down below.
							Example : 
							Get under quickly!.