1. At a position directly lower than (with the subject just above)
   "the floor under the table";
   - neath [archaic], beneath, below, underneath

1. Located below or beneath something else
   "the under parts of a machine";
   - nether
    
2. Lower in rank, power, or authority
   "an under secretary"

1. Down below
   "get under quickly!"
    
2. Further down
   "see under for further discussion";
   - below
    
3. Below the horizon
   "the sun went under"
    
4. Below some quantity or limit
   "fifty dollars or under"
    
5. In or into a state of subordination or subjugation
   "we must keep our disappointment under"
    
6. Into unconsciousness
   "this will put the patient under"
    
7. Through a range downward
   "children six and under will be admitted free"
    
8. Down to defeat, death, or ruin
   "their competitors went under"

1. Insufficiently
    
2. Under, lower, below, secondary, inferior
   - sub-

See also: low, low-level, subordinate, subsidiary

Encyclopedia: Under