A strip of gauze or similar material used to protect or support a wound or injury.
A strip of cloth bound round the head and eyes as a blindfold.
[…] the president informed him that one of the conditions of his introduction was that he should be eternally ignorant of the place of meeting, and that he would allow his eyes to be bandaged, swearing that he would not endeavor to take off the bandage.
(figuratively, by extension) A provisional or makeshift solution that provides insufficient coverage or relief.
This new healthcare proposal merely applies a bandage to the current medical crisis.
verb
To apply a bandage to something.
1879, Samuel Clemens (as Mark Twain), A Tramp Abroad, https://web.archive.org/web/20140811201712/http://etext.virginia.edu/etcbin/ot2www-pubeng?specfile=%2Ftexts%2Fenglish%2Fmodeng%2Fpublicsearch%2Fmodengpub.o2w
...they ate...whilst they chatted, disputed and laughed. The door to the surgeon's room stood open, meantime, but the cutting, sewing, splicing, and bandaging going on in there in plain view did not seem to disturb anyone's appetite.