1.
If people or things walk or move ~, they are next to each other, side by side, and facing in the same direction.
The steep pavement was too narrow for them to walk ~.
ADV: ADV after v, num ADV
2.
If you are ~ of someone or something, you are level with them or in line with them.
As he drew ~ of the man he pretended to stumble.
PREP-PHRASE
3.
If you keep ~ of a subject, you know all the most recent facts about it.
He will be keeping ~ of the news...
PREP-PHRASE