Although not technically correct, people would refer to a Jedi that's higher in rank than them simply by calling them master. It was a form of showing respect.
Actually despite the other answers on here, the actual canon answer given is that Anakin was a legendary Jedi, and would be called Master if Ahsoka had become a knight.
One of the biggest factors that prevented Anakin from becoming a Jedi Master was the distrust stemming from his superiors, particularly Mace Windu. During the Star Wars prequel trilogy, Anakin wasn't shown to train a Padawan, but there was no doubt he was skilled in the Force.
Despite being one of the youngest Council members ever, Anakin was outraged that he wasn't given the rank of Master as well. His time on the Council would be short-lived, though, as not long after he would be responsible for the fall of the Order, carrying out the Great Jedi Purge as Palpatine's apprentice.
A Jedi Master, as the name implies, is one who has attained mastery of the Force. Although the first Jedi Master to appear in Star Wars was Obi-Wan Kenobi in "A New Hope," the title wasn't explicitly used until Luke trained under Yoda in "The Empire Strikes Back."
There are generally three types of Jedi classifications; Jedi Consular, Jedi Guardian, and Jedi Sentinel. A Jedi Consular (also called a Jedi Seer) is, like all Jedi, skilled in battle, but rarely enters combat, preferring to study the mysteries of the Force.
Vader held respect for Tarkin which is clearly shown and the only case in which Tarkin outranked Vader would be the case in which Vader was in the Death Star or within Tarkin's Oversector which he likely was as Tarkin was Grand Moff of the Outer Rim Oversector, the largest one.
How Anakin Almost KILLED Mace Windu When Denied the Rank of MASTER - Star Wars Explained. In Star Wars Revenge of the Sith, we all know the scene where Mace Windu tells Anakin Skywalker that isn't granted the rank of Master...
Billaba became Windu's Padawan and trained under the Jedi Master in the ways of the Force. During her training, Windu allowed her to study Form VII variant known as Vaapad. She eventually became a Jedi Knight, renowned for her skills with a lightsaber and favored Form III when teaching other Jedi.
After serving as a Jedi Knight for three years, Anakin Skywalker advanced to the point in his training that he felt he deserved the rank of Jedi Master, though the Council did not agree.
You know, the reason Mace Windu told Anakin to wait in the Council Chambers is because when he got back from killing Darth Sidious, Mace Windu planned on granting Anakin the rank of master.
Qui-Gon Jinn was a respected, independent Jedi Master who first located and identified Anakin Skywalker as the Chosen One foretold in the Jedi Prophecy.
Well, to be literal, she was never mentioned because she hadn't been created at the time Episode III was made. But speaking in terms of the Star Wars canon, perhaps she just wasn't mentioned on screen.
The marriage, witnessed by the droids C-3PO and R2-D2, was kept secret due to Amidala's place as a prominent Senator in the Galactic Republic and because of Skywalker's membership in the Jedi Order; the Jedi Code prevented Jedi from falling in love and forming attachments such as marriage.
When she was 14, Jedi Master Yoda granted Ahsoka the rank of Padawan and apprenticed her to Anakin Skywalker, a powerful if reckless Jedi Knight.
The ever stronger fear
In the Phantom Menace, Master Yoda senses much fear in Anakin, however, this fear is not the understandable anxiety - Anakin is afraid to lose his mother, Shmi, whom he was forced to leave behind in slavery.
Watto was a Toydarian junk dealer in Mos Espa who bought Shmi Skywalker and her son Anakin from Gardulla the Hutt. An inveterate gambler, he sponsored Anakin in several Podraces, but often bet against his own slave, who was talented but inexperienced.
In 32 BBY, Kenobi attained the rank of Jedi Knight by defeating the Sith Lord Darth Maul during the Invasion of Naboo.
Because he was not an active member of the Jedi Order during Order 66, Infil'a escaped execution. Some time later, he faced the Sith Lord Darth Vader wielding a green lightsaber. Infil'a put up a fierce fight against Vader, almost killing him by throwing the Sith Lord off of a cliff.
1/15 Luke Skywalker
Having faced his father once before, Luke was familiar with his tactics and used the force to gain an upper-hand. In Star Wars Canon, only Luke Skywalker can be acknowledged as the one who truly defeated Darth Vader.
Admiral Ozzel : [appearing onscreen with Captain Piett] Lord Vader, the fleet has moved out of lightspeed and we're preparing to... Darth Vader : You have failed me for the last time, Admiral! Captain Piett?
In the Star Wars Legends continuity, the founders of the Jedi Order were Jedi Masters Cala Brin, Garon Jard, Rajivari, and Ters Sendon.
Arguably, some of the rarest types of Jedi were the so-called Iron Knights. These are members of the Shards species - crystals with a brain of their own. They were Force-sensitive and all trained under the tutelage of Jedi Master Aqinos. The Shards had droid bodies, similar to that of General Grievous.