By memory vs Remember

When to use each in English, with meaning, register, and examples.

By memory

Top 3,000 (common)

Remember

Top 1,000 (very common)A1verb
Most common: Remember
 By memoryRemember
Pronunciation🇬🇧 //baɪ ˈmɛməri//🇺🇸 //baɪ ˈmɛməri//🇬🇧 /["/rɪˈmembə(r)/","/rɪˈmembəz/","/rɪˈmembəd/","/rɪˈmembərɪŋ/"]/🇺🇸 /["/rɪˈmembər/","/rɪˈmembərz/","/rɪˈmembərd/","/rɪˈmembərɪŋ/"]/
MeaningRemembering something without looking at notes.To keep something in your mind.
ExampleShe recited the poem by memory during the class.Please remember to bring your homework tomorrow.
RegisterNeutralNeutral
How commonTop 3,000 (common)Top 1,000 (very common)
CEFR level-A1
Part of speechverb
Collocationslearn by memory, recall by memory, speak by memory, write by memory, sing by memoryclearly, distinctly, vividly, can, try to, be important to, as, for, clearly, distinctly, vividly, can, try to, be important to, as, for, clearly, distinctly, vividly, can, try to, be important to, as, for
Antonyms-forget
Common mistakesConfusing with 'from memory', which has a similar meaning but is less formal., Using in very formal situations where a more precise term is required., Forgetting to use context to clarify what is being remembered.Using 'remember' when you mean 'remind'., Confusion between 'remember' and 'forget'., Omitting the object, e.g., saying 'I remember' without specifying what.
Usage notesCommonly used in academic and informal settings. Avoid in highly technical or formal writing.Use 'remember' when referring to recalling information or past experiences. It is neutral and widely applicable but avoid in very formal contexts where alternatives like 'recollect' might be more suitable.

See it in real clips

By memory
Remember

Frequently asked questions: By memory vs Remember

What's the difference between By memory and Remember?

By memory: Remembering something without looking at notes. Remember: To keep something in your mind.

Which is more common: By memory and Remember?

Remember is the most common in everyday English.

Can you show an example of each?

By memory: She recited the poem by memory during the class. Remember: Please remember to bring your homework tomorrow.

Can I use By memory and Remember interchangeably?

Not always. By memory and Remember are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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