Source: Extra Practice
Choose the correct meaning of the underlined idiom in the given sentence: 'My uncle lives in Canada, so he visits us once in a blue moon.'
Options
Option A is correct
Very rarely
Option B
Every month
Option C
On full moon nights only
Option D
Very frequently
Explanation
The idiom 'once in a blue moon' is used to describe an event that happens very rarely. A 'blue moon' (the second full moon in a single calendar month) is a rare occurrence, which is why the phrase is metaphorically used for rare events. Options 2, 3, and 4 do not represent the correct meaning of this idiom.