to get on (train, plane, bus, ship, etc.); to get in; to board; to take; to embark
EXAMPLE
どの電車(でんしゃ)に乗(の)るのですか。
Which train are you going to take?
to get on (e.g. a footstool); to step on; to jump on; to sit on; to mount
EXAMPLE
動(うご)いている列車(れっしゃ)に飛(と)び乗(の)るのは危険(きけん)である。
It is dangerous to jump onto a moving train.
Related:載る
to reach; to go over; to pass
to follow; to stay (on track); to go with (the times, etc.)
EXAMPLE
日本(にっぽん)の若者(わかもの)は流行(りゅうこう)に乗(の)る傾向(けいこう)があります。
The youth of Japan have a tendency to follow fashion.
to take part; to participate; to join
to get into the swing (and sing, dance, etc.)
to be deceived; to be taken in

What does 乗る mean in English?

to get on (train, plane, bus, ship, etc.); to get in; to board; to take; to embark(v5r, vi)
to get on (e.g. a footstool); to step on; to jump on; to sit on; to mount(v5r, vi)
to reach; to go over; to pass(v5r, vi)
to follow; to stay (on track); to go with (the times, etc.)(v5r, vi)
to take part; to participate; to join(v5r, vi)
to get into the swing (and sing, dance, etc.)(v5r, vi)
to be deceived; to be taken in(v5r, vi)
to be carried; to be spread; to be scattered(v5r, vi)
to stick; to attach; to take; to go on(v5r, vi)

乗のる乗のる