preposition
in a line matching the length or direction of (something)
at a point on (something)
adverb
in a forward direction
used to say that someone or something is brought or taken with you when you go somewhere
at or to an advanced point
at a particular place :here or there
from one person to another
all along
during the entire time since something began
along about
US informal :at a time near (a specified time) :about, around
along with
in addition to (something or someone)