À Point means “just right”, “ready” or “exactly right.”
What that means varies by context:
“To know if the oil is à point, put a piece of bread in it”
“Bring the sauce à point by adding some butter to it”
“When the sauce is almost à point, add…”
When referring to a steak, it means rare. For a roast beef, it means an internal temperature of about (65 c); drops of blood should be seen when you press on its surface.
For vegetables, it refers to the state between mushy and “too crispy” (as sadly is the trend these days, as people confuse stir-frying with Sunday roast dinners..) The colour and texture should be preserved.