#1 bear down v. exert a force with a heavy weight; "The snow bore down on the roof". wn
#2 bear down v. contract the abdominal muscles during childbirth to ease delivery. wn
#3 bear down v. to make a rush at or sudden attack upon, as in battle; "he saw Jess charging at him with a pitchfork". wn
#4 bear down v. exert full strength; "The pitcher bore down". wn
#5 bear down v. pay special attention to; "The lectures bore down on the political background". wn
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