The Stade Français playmaker has fallen out of Meyer's favour since the rise of Handrè Pollard during the 2014 Junior World Championship.
Nevertheless, Steyn's impressive CV saw him force his way into the South African World Cup squad and he has now been selected in the matchday 23 for the clash against the USA at the Olympic Stadium in London.
"Morné's probably what all South Africans and Springboks should be," said the former Bulls coach.
"He's here to serve and the thing that hasn't been nice for him is that youngsters have been playing ahead of him. He's done everything, played 70-odd tests, been a World Cup winner, beat the British and Irish Lions on his own.
"I never had to keep him positive, he's been in great form and he's been an example to everyone, helping other guys with their kicking. He's a great ambassador for South Africa so I’m really happy for him."
Meanwhile, Meyer is remaining quietly confident that his charges can go all the way in England despite losing to Japan in the group stages. Should the Springboks win the World Cup, it will be the first time a team has done so after losing a match in the pools.
"There are so many examples of comebacks throughout the world, of things that people said could never happen," continued an optimistic Meyer.
"They said the mile would never be run in under four minutes and now everybody's running under four minutes.
"I'm a very positive person, I believe anything is possible and I've been in situations where I've lost every single game, come back and won trophies. But we don't look past this game. I mean it."
