🇬🇧 Fluctuation meaning: English Vocabulary Flash Card

A fluctuation is when something keeps going up and down or changing instead of staying the same. It’s like a wiggly line instead of a straight line. For example, the temperature outside, your mood, or the height of waves in the ocean can all have fluctuations because they don’t stay exactly the same all the time.

The fluctuation of the classroom noise level matched the teacher’s patience level—only in opposite directions.

My neatness had a strange fluctuation: my room was a disaster, but my snack drawer was organized like a museum.

There was a noticeable fluctuation in the cat’s interest in me—only high when I held food.

The fluctuation of my enthusiasm for homework went from low to negative numbers.

The fluctuation of the baby’s volume ranged from tiny squeak to fire-alarm siren in two seconds.

On the porch Anna watched the fluctuation of the lantern as wind rose and fell. Each fluctuation threw shadows that danced across the wall. Each fluctuation, each small fluctuation, made her breath hitch then slow. She laid her hand on the table, feeling the steady end of the last fluctuation, and smiled when the light stilled.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

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