Does '' bear down on'' mean: bite or take strong measures against?

I am learning phrasal verb on https://www.englishpage.com/prepositions/phrasaldictionaryB.html. According to this website,'' bear down on'' means bite or take strong measures against. And I looked it up on Longman and Oxford dictionary, but i couldn't find these meanings. :((

Solution 1:

From M-W:

bear down on

1 : emphasize

2 : to weigh heavily on : Burden

• But for all the political pressure bearing down on Hong Kong, the city still has a way of defying the naysayers and standing up — even if that means rising against the tide of history itself.

The example from your source is:

The U.S.A. is bearing down on drug traffickers.

which, figuratively, may imply taking measures against ....