amusingly or repellently unnatural or ugly in appearance, usu tending towards ugliness

absurdly incongruous or inappropriate

of the grotesque style in art

a style of decorative art in which incongruous or fantastic human and animal forms are interwoven with natural motifs (e.g. foliage)

asomebody who is grotesque person or thing in appearance

All who have passed the age of thirty are joyless grotesques … staying alive without, so far as the child can see, having anything to live for — George Orwell

a family of 19th-cent. sans serif typefaces