Meaning of REASONING in English

REASONING

rea ‧ son ‧ ing /ˈriːz ə nɪŋ/ BrE AmE noun [uncountable]

[ Word Family: noun : ↑ reason , ↑ reasoning , ↑ reasonableness ; adjective : ↑ reasonable ≠ ↑ unreasonable , ↑ reasoned ; verb : ↑ reason ; adverb : ↑ reasonably ≠ ↑ unreasonably ]

a process of thinking carefully about something in order to make a judgment

scientific/logical/legal reasoning

reasoning behind

What is the reasoning behind this decision?

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.