No, an iris is not a lily. Although they are both flowering plants, they belong to different plant families. Irises are members of the Iridaceae family while lilies belong to the Liliaceae family.
Irises get their name from the Greek word for rainbow, and these flowers certainly live up to their name! With over 200 species, irises come in a wide range of colors including yellow, blue, purple, pink and white. They have six petals - three inner petals (or falls) that hang down and three outer petals (or standards) that stand up. Irises typically bloom in the springtime.
Lilies also come in many different colors including white, yellow, orange, pink and red. These flowers have trumpet-shaped blooms with six petals - two outer petals and four inner ones. Lilies typically bloom in the summertime.
So although irises and lilies share some similarities, they are definitely not the same flower!