1.
If something stands out , it is very noticeable.
Every tree, wall and fence stood out against dazzling white fields...
PHRASAL VERB : V P
2.
If something stands out , it is much better or much more important than other things of the same kind.
He played the violin, and he stood out from all the other musicians...
PHRASAL VERB : V P from n
3.
If something stands out from a surface, it rises up from it.
His tendons stood out like rope beneath his skin...
= stick out
PHRASAL VERB : V P