otherwise

otherwise — conjunction

1. after advice, an order, or a warning, introduces what will happen if it is ignor

1.conjunctionB1
Definition

after advice, an order, or a warning, introduces what will happen if it is ignored.

Example

Take the cake out now, otherwise it will burn on top.

otherwise + result after an instruction

You should lock the gate, otherwise the dog may run out.

Common collocations
  • otherwise it will
  • otherwise you will
  • otherwise someone could
  • otherwise the dog may
Synonyms
  • or else

    more direct and sometimes stronger in speech

  • if not

    common in similar warning sentences, but often more tied to conditional structure

  • failing that

    more formal and common in instructions or plans

Grammar Patterns

clause, otherwise + clause

Usage Note

Most often links a suggestion or command with its likely consequence. Distinguish from adverb sense 3: this sense warns someone about the next result, while sense 3 imagines a different situation from the real one.

Common Mistakes

Otherwise you don't call home, your parents worry.
Call home, otherwise your parents will worry.
this word usually follows the advice or order, not a full negative clause at the start.

otherwise — adverb

otherwise — adjective

Synonym discussion

Sense: conjunction/1

For conjunction sense 1, 'otherwise' is a neutral way to warn about the result of ignoring advice: 'Leave now, otherwise you'll miss the train.' 'Or else' is stronger and can sound more threatening. 'If not' is close in meaning, but it fits more naturally inside a fuller conditional structure. 'Failing that' is more formal and often appears in written instructions or plans. Plain 'or' can connect alternatives, but it usually does not clearly express a negative consequence by itself. A useful contrast is: 'Back up the file, otherwise you may lose it,' but 'Back up the file, or else you may lose it' sounds sharper.

Etymology

Old EnglishMiddle EnglishEnglish

Otherwise comes from an Old English phrase meaning 'in another way'. It joins the idea of 'other' with an older use of 'wise' meaning 'manner' or 'way'. Over time, English speakers treated the phrase as a single word.