If you have looked up the meaning of a dream anywhere in the Muslim world, or on any of the thousands of dream-interpretation sites that serve it, you have encountered his name. Ibn Sirin is cited more often in this field than any other figure, usually in a formula: the interpretation of X in a dream according to Ibn Sirin.
He was a real person, and a considerable one. It is worth knowing who he was, and it is worth knowing what the scholarship actually says about the books that bear his name — because the second part is almost never mentioned by the sites that quote him most confidently.
The man
Muhammad ibn Sirin was born around 653 CE in Basra, in what is now Iraq, and died there around 729. He belonged to the tabi'un, the generation that followed the Prophet's companions, and he is remembered in the biographical literature as a transmitter of hadith, a jurist, and a man of noted personal scrupulousness. His father had been a captive brought to Iraq, later freed.
Within that biography, dream interpretation is a genuine and repeatedly attested part of his reputation. The tradition preserves accounts of people bringing him dreams and of his readings of them. That much is well grounded.
The books
Here the picture changes. The works circulating under his name today — above all the widely printed Muntakhab al-Kalam fi Tafsir al-Ahlam, and the various Ta'bir al-Ru'ya compilations — are regarded by scholars working on the manuscript tradition as substantially later productions. The general view is that material accumulated over generations, drew on Ibn Sirin's reputation, and was published under his name because that name carried weight.
This is not an unusual pattern, and it is not a scandal. Pseudepigraphic attribution to a respected authority was ordinary practice across the medieval world, in Arabic, Greek, Latin, and Hebrew alike. But it does have a consequence that matters for anyone consulting these books today: the confident, itemised readings you find quoted online do not have the authority of a seventh-century master behind them. They have the authority of an accreted popular tradition, which is a real thing but a different thing.
What that changes, and what it does not
It changes how much weight a specific entry should bear. If a manual tells you that a particular object in a dream signifies a particular outcome, that is a datum from a tradition, not a ruling from a scholar of the second Islamic century, and it should be held accordingly.
It does not change the underlying conviction that some dreams are meaningful. That conviction does not rest on the manuals at all. It rests on the Quran and on the canonical hadith collections, which take the category of the true dream, the ru'ya, entirely seriously — distinguishing it from the disturbance of hulm and from the mind's own chatter, and preserving the saying that a true dream is one of the parts of prophethood. We set that material out carefully in what Islam itself teaches about true dreams.
So the honest position is a layered one. The conviction that God speaks through some dreams: well founded in the primary sources. The elaborate dictionary that tells you what a fig or a staircase or a white garment specifically portends: a later tradition, useful perhaps, authoritative less so.
Interpretation was never meant to be mechanical
One point the manuals themselves make, and their online summarisers almost always drop, is that interpretation depends heavily on the dreamer. The same image was understood to mean different things depending on who dreamt it, in what circumstances, in what state of mind and conduct. The tradition's own interpreters were considerably more cautious than the lookup tables suggest.
Which raises an obvious difficulty for the whole enterprise, and it is worth stating directly: a system that requires this much contextual judgement cannot really be automated into a dictionary at all. That is precisely what has been done to it, at enormous scale, by sites that profit from the traffic.
When the dream is not a symbol
There is one category the manuals handle poorly, and it is the reason many readers arrive at a page like this one.
The interpretive system assumes a dream is made of symbols standing in for something else. But some dreams are not reported that way by the people who have them. When someone describes a man in a white robe standing close, a face too bright to look at, and a few words spoken directly to them, they are not describing a symbol requiring decoding. They are describing an encounter, and what they want is not an interpretation but an identification.
That pattern is documented across the Muslim world in numbers that researchers have found difficult to explain away — see the research on why so many Muslims are dreaming of Jesus — and its recurring details are examined in what the man in the white robe means. The tradition has a name for a dream that is not the mind's own noise. It simply does not have an entry for this one.
Common questions
Is it forbidden to interpret dreams in Islam?
No. The Quran itself contains extended dream-interpretation narratives, most famously in the account of Yusuf. The tradition treats interpretation as a real and serious practice, while warning against interpreting carelessly or for gain.
Are the online Ibn Sirin dream dictionaries reliable?
Treat them with caution. Most are machine-translated aggregations that copy from one another, and they present a contested and heavily accreted tradition as though it were settled scholarship.
Where should I look instead?
For the primary-source picture, start with the Quran and hadith material on true dreams. For a practical test of whether a particular dream carries weight, see how to tell whether a dream is from God. And for the single most looked-up entry in the whole tradition, see what white clothes are said to mean.