https://www.google.com/search?q=patch+definition

Definitions from Oxford Languages
patch

noun: patch; plural noun: patches

1.
a piece of cloth or other material used to mend or strengthen a torn or weak point.
"the jacket was of well-worn tweed with leather patches on the elbows"
h
Similar:
reinforcement

piece sewn on

a pad or shield worn over a sightless or injured eye or an eye socket.
h
Similar:
cover

eyepatch
covering
pad

shield
a piece of cloth sewn onto clothing as a badge or distinguishing mark.
"on his sleeve there was a red “Freedom” patch"
an adhesive piece of drug-impregnated material worn on the skin so that the drug can be absorbed gradually over a period of time.
"once the patch is removed, the drug clears from the body tissue after twenty minutes"
historical
a small disk of black silk attached to the face, especially as worn by women in the 17th and 18th centuries for adornment.

2.
a part of something marked out from the rest by a particular characteristic.
"his hair was combed forward to hide a growing bald patch"
h
Similar:
blotch
mark
pop
spot
smudge
dot
speck
speckle
smear
stain
streak
stripe
blemish
birthmark
port wine stain
strawberry mark
splodge
splotch
nevus

a small area or amount of something.
"patches of bluebells in the grass"

3.
a small piece of ground, especially one used for gardening.
"they spent Sundays digging their vegetable patch"
h
Similar:
plot
area
piece
strip
row
lot
tract
parcel
bed
border
allotment

informal•British
an area for which someone is responsible or in which they operate.
"we didn't want any secret organizations on our patch"

4.
informal•British
a period of time seen as a distinct unit with a characteristic quality.
"he may have been going through a bad patch"
h
Similar:
period
time
spell
phase
stretch
interval
stint
run
term
span
extent

spot
5.
a temporary electrical or telephone connection.
a preset configuration or sound data file in an electronic musical instrument, especially a synthesizer.
"the guitar player has a certain patch on his FX which he's happy with"
6.
Computing
a small piece of code inserted into a program to improve its functioning or to correct an error.
"a program patch that fixes a bug"

verb
verb: patch; 3rd person present: patches; past tense: patched; past participle: patched; gerund or present participle: patching

1.
mend or strengthen (fabric or an item of clothing) by putting a piece of material over a hole or weak point in it.
"her jeans were neatly patched"
h
Similar:
mend

repair
put a patch on
cover
sew
sew up
stitch
stitch up

Medicine
place a patch over (a good eye) in order to encourage a lazy eye to work.
"the amblyopia may be treated by patching the good eye"
Computing
correct, enhance, or modify (a routine or program) by inserting a patch.
cover small areas of (a surface) with something different, causing it to appear variegated.
"the grass was patched with sandy stretches"

2.
informal
treat someone's injuries or repair the damage to something, especially hastily.
"they did their best to patch up the gaping wounds"