Noun
A
knapsack
,
sometimes
mounted
on
a
light
frame
,
but
always
supported
by
straps
,
worn
on
a
person
โ€™
s
back
for
the
purpose
of
carrying
things
,
especially
when
hiking
,
or
on
a
student
'
s
back
when
carrying
books
.
Verb
To
hike
and
camp
overnight
in
backcountry
with
one
'
s
gear
carried
in
a
backpack
.