What's difference between ludicrous and ridiculous? Are they completely synonymous?

4 Answers 4


Under the entry for laughable in Merriam-Webster's Eleventh Collegiate Dictionary (2003), a note on synonyms has this side-by-side comparison of ludicrous and ridiculous:

LUDICROUS suggests absurdity that excites both laughter and scorn {a thriller with a ludicrous plot}. RIDICULOUS suggests extreme absurdity, foolishness, or contemptibility {a ridiculous display of anger}.

So the distinction between ludicrous and ridiculous, MW seems to assert, comes down to the difference between absurdity that may provoke scorn and absurdity that may provoke contempt, within a larger context in which both words involve "provoking laughter or mirth." In my experience, ludicrous tends to be used most often to describe a situation that has elements of farcical incongruity, whereas ridiculous is a more common, all-purpose term whose meaning amounts to "not to be taken seriously."

As the following Ngram chart for ludicrous (red line) versus ridiculous (blue line) for the period 1700–2005 indicates, the frequency of use of both terms in Google Books' database of published works has decreased slightly but fairly steadily for most of the past century, and the difference in frequency between the two words has remained remarkably consistent:


Both terms are used to indicate absurdity; the subtle difference is that ludicrous means amusingly so, and ridiculous means inviting ridicule or mockery.

  • 14
    Also, to us scrabble players, LUDICROUS + I = RIDICULOUS.
    – jackgill
    Commented Jun 29, 2011 at 19:46
  • 1
    Not necessarily only 'amusingly' but can also be such that it invites scorn. And I feel that something ludicrous does not always invites laughter and scorn at the same time.
    – Computist
    Commented May 5, 2016 at 23:05

Because M-W doesn't make a very clear distinction, at least in my mind, I think the most significant distinction is between their respective etymologies. Ridiculous comes from the same Latin word as, for instance, our deride. Ludicrous comes from the same word as the Latin word for game, and perhaps originally had some connotation of making a game or sport of something. In any event, in contemporary English, even in Merriam-Webster, significant distinction seems to be lost.


The NOAD reports the following notes:

Ludicrous applies to whatever is so incongruous that it provokes laughter or scorn ("a ludicrous suggestion that he might escape unnoticed if he dressed up as a woman"), and ridiculous implies that ridicule or mockery is the only appropriate response ("she tried to look younger, but succeeded only in making herself look ridiculous").

  • 3
    Is that distinction really true? It strikes me that in your example, the words might be used interchangeably. In fact, even Merriam-Webster doesn't seem to make a clear distinction between them.
    – Ryan Haber
    Commented Jun 29, 2011 at 20:40
  • I asked to my fiancé, who is American, and she told me that what reported by the NOAD is how she uses the words. To notice that the NOAD is an American English dictionary.
    – avpaderno
    Commented Jun 29, 2011 at 20:47
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    @Ryan: There is definitely a distinction, but it's very, very subtle; and the terms do have a huge amount of overlap. In my opinion, they are close enough that (1) using the "wrong" one will still be plenty accurate for virtually any context, and (2) so few people can actually discern the difference that skillful use of one over the other will probably be lost on your audience anyway.
    – John Y
    Commented Jun 29, 2011 at 22:47

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