Astronaut's "Everything's fine"

• Perfectly fine, to an astronaut: Hyph
• Mission control go-ahead
• Letters of satisfaction
• ''Fine, Houston''
• Astronaut's 'thumbs-up'
• Quite all right
• Perfectly fine, informally
• Intensive affirmative
• Perfect, informally

Wiktionary Word definitions in Wiktionary
a. (alternative spelling of A-okay English)