This is the 4525th most frequent Russian word.
выражение
"Expression" - a word or phrase, or the act of conveying thoughts or feelings.
'выражение' here is used as 'expression' in the context of facial or emotional expression.
Её выражение лица показало удивление.
Her facial expression showed surprise.
'выражение' here means 'phrase' or 'specific wording', often used to refer to established idiomatic or formal phrases.
Это выражение обычно используется в официальных документах.
This phrase is typically used in official documents.
'выражение' in this sentence refers to 'expression' in the context of a mathematical formula or calculation.