be on the safe side
Meaning
To act cautiously to avoid risk or problems, especially when you are unsure about the situation.
Origin
From the idea of choosing the “safe side” versus the risky side in uncertain situations; recorded in English from at least the 19th century as a cautionary phrase meaning “just in case.”
Notes
Cautious, practical tone meaning “just in case.” Often implies uncertainty and a desire to prevent trouble. Common in everyday and business contexts; typically followed by the precaution taken.
Examples
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Take an umbrella to be on the safe side; the forecast keeps changing.
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Let’s leave early to be on the safe side in case there’s traffic.
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I’ll save a copy of the file on a USB drive, just to be on the safe side.
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Even though it looks fine, I’m going to get a second opinion to be on the safe side.
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Be on the safe side and double-check the address before you head out.
Grammar & Usage Notes
Usually used as “to be on the safe side” or “just to be on the safe side.” The verb inflects (am/was/being). Often followed by a clause explaining the precaution (e.g., “...and brought an extra copy”).
Synonyms
- play it safe
- err on the side of caution
- just in case
- to be cautious
Antonyms
- take a risk
- risk it
- throw caution to the wind
- live dangerously