What does major faults ( majflt/s) mean?

Issue

• The system constantly reports high majflt/s (major faults) in sar logs. What does it means?

12:00:01 AM  pgpgin/s pgpgout/s   fault/s  majflt/s  pgfree/s pgscank/s pgscand/s pgsteal/s    %vmeff
01:20:02 AM   1226.99    170.54  13328.12    110.56   7537.61      0.00     16.81     16.26     96.74
02:20:01 AM   4596.70    236.00  15292.38    231.96   8995.12    759.54     72.39    808.27     97.16
03:10:01 AM    610.41    285.40  14902.04     64.80   8788.38     90.38    331.67    377.95     89.55
05:00:01 AM    317.74    215.17  11989.60     56.56   7336.79      0.00    108.94    107.33     98.53
07:10:01 AM  13482.37    427.35  14216.55     95.25  11103.51   2950.74    372.63   3221.13     96.92
07:40:01 AM  10353.27    276.80  15095.81    180.62  11202.91   2408.22    220.23   2483.43     94.48
08:30:01 AM   1197.00    252.91  14452.76     61.01   8545.31    179.64    178.11    289.25     80.85
09:10:01 AM   9136.85    711.41  13595.80     87.23   9879.34   2309.82    213.73   2225.77     88.20
12:10:01 PM    497.35    507.38  15616.19     56.24   8557.44      0.00    185.31    126.79     68.42
12:20:02 PM   9692.12    854.50  15438.12    115.16  10726.94   2621.21     87.82   2291.53     84.59