Pronunciation: [dˈə͡ʊst ɐ tˈe͡ɪkɒf] (IPA) 
The correct spelling of the phrase "doest a takeoff" would be "does a takeoff". The reason for this is that "doest" is an archaic form of the word "does" that is no longer in use in modern English. The correct pronunciation of "does" is /dʌz/ in IPA phonetic transcription. Therefore, the correct spelling and pronunciation of the phrase should be "does a takeoff".
"Doest a takeoff" is not a standard phrase or term commonly used in the English language. It appears to be a combination of archaic language and incorrect grammar.
However, based on the interpretation of the phrase, a dictionary definition could be constructed as follows:
"Doest a takeoff" (archaic and incorrect usage): A hypothetical phrase that indicates the action of conducting or performing a departure or ascent. The term "doest" is an archaic form of the verb "do" used in second person singular present indicative, which is now obsolete in modern English. "Takeoff" refers to the act of a vehicle or aircraft becoming airborne or leaving the ground, typically at the beginning of a flight.
The phrase "doest a takeoff" could be interpreted as a poetic, outdated manner of describing the act of initiating a journey or embarking on a new endeavor. Its usage is not recommended, as it combines archaic language with incorrect grammar, and may cause confusion or misunderstanding.
