Definition of "ill-informed"

The Southern Region takes, in the main, a candid line with its public. [...] An ill-informed attempt to blackguard the railway publicly is likely to see the complainant put politely—but very firmly—in his place.

1962 August, “Let's have plain speaking”, in Modern Railways, page 73

Despite their age, and a spot of ill-informed mainstream media criticism, there is plenty of life left in the HSTs.

2019 October 23, Pip Dunn, “The next king of Scotland”, in Rail, page 50