to stand: to be on one's feet, to be positioned somewhere, or to hold one's ground
This is the ordinary, physical sense and by far the most common one in the New Testament. Someone stands up, stands in a place, or is found standing there. It is the plain opposite of sitting, lying, or falling, and the Gospels and Acts use it constantly to set a scene: people standing in a crowd, by a door, at a distance, before a ruler.
From that bodily picture the word stretches in two natural directions. One is simply to stop, to come to a standstill, when motion ceases and a person or thing stays put. The other is the figurative use that mattered most to the early church: to stand firm, to keep one's footing, to remain steady under pressure instead of being knocked down. In the letters this becomes a picture of staying faithful, holding the position God has given, and not collapsing when tested.
These are shades of one idea, not separate words. Whether the standing is literal posture, a halt, or steadfast loyalty, the core is the same: to be set on one's feet and to stay there.