true level

true level

n
(Physical Geography) a hypothetical surface that is perpendicular at every point to the plumb line, such as the mean sea level or geoid: a still liquid surface is at true level.
References in classic literature ?
How they'll squint and glane, and say, 'This is yer mighty match is it; this is yer getting back to the true level of yer forefathers in King Norman's time!' I feel this is too much, Joan; I shall put an end to myself, title and all--I can bear it no longer!
He said that economic policy should be dealt at true level rather at an inappropriate level by the government.
Feature complete means Tesla attaining true Level 5 driverless autonomy.
The average field size was 6.1, but that figure fails to reflect the true level of competitiveness because 20 per cent of runners started bigger than 20-1 and, in the eyes of most, had no chance.
"This result is totally unsatisfactory because it does not reflect the true level of our preparedness.
This result is totally unsatisfactory, because it does not reflect the true level of our preparedness," the Al-Youm Assabaa newspaper quoted the Saudi Football Federation Chief Adel Ezzat as saying
Mounana did not show their true level, he said, keen to explain this point clearly to the players during the lectures held with them over the past two days to alert them of the importance of the game and not to rely on the result of the first match.
The revamped test should be available in more native languages to allow students to demonstrate their true level of mastery, and test items should more closely align with classroom instruction, the state stipulated.
Therefore, PTA has engaged the Pakistan Bureau of Statistics (PBS) to carry out a national survey for measuring the true level of ICT development in Pakistan.
According to a report in Saudi Gazette, Shura councillors have asked the Ministry of Environment, Water and Agriculture to carry out a field study to assess the true level of water consumption by citizens and the costs involved.
The company is decreasing spending on factories, equipment and models to curb multi-billion-euro costs from a scandal concentrating on up to 11 million diesel vehicles that contain software capable of deceiving regulators about the true level of their toxic emissions.