Pronunciation: [wˈɒn ba͡ɪ wˌɒn] (IPA) 
The correct spelling of the phrase "one by one" is /wʌn baɪ wʌn/. The first word is spelled with the letter "o" but pronounced with the sound of /ʌ/. The word "by" is spelled with a "y" but pronounced with the sound of /aɪ/. And the final word "one" ends with the letter "e" but is pronounced without it, as /wʌn/. This phrase means to do something or count each item separately, one at a time.
"One by one" is an idiomatic phrase that means each individual item or person is considered or dealt with separately and in sequence. It describes a methodical or systematic approach of addressing things or individuals individually, in contrast to a collective or simultaneous manner.
This expression is commonly used to describe actions that occur in a step-by-step or orderly fashion, where each item or person is given focused attention or consideration before proceeding to the next. It implies a deliberate and careful approach, often used to emphasize thoroughness, precision, or patience in completing a task or process.
The phrase "one by one" can be applied to a wide range of situations. For instance, it may describe a teacher evaluating each student's performance, a speaker addressing audience members individually during a question-and-answer session, or a person examining a collection or series of objects individually to assess or appreciate their characteristics.
Furthermore, "one by one" can also be used metaphorically, indicating the gradual or sequential occurrence of events or changes. It suggests a progression that unfolds steadily, allowing for focused attention or understanding of each step along the way.
Overall, "one by one" emphasizes a meticulous and sequential approach where items or individuals are considered methodically and systematically, either in a literal or metaphorical sense.
