daddy longlegs /ˈdædɪ ˈlɒŋ(ɡ)lɛɡz/ noun3 •(US, Australia) Any (non-spider) arachnid of the order Opiliones, mostly with long thin legs.Unlike spiders, daddy longlegs do not have a clearly marked division between thorax and abdomen. They are further distinguished from spiders in that they do not produce venom or silk. — 2002 •(UK, Ireland) The cranefly; any insect of the suborder Tipulomorpha.Daddy longlegs adults are weak flyers, falling onto the water surface in the lightest of breezes, and even on calm days. — 2004 •The daddy long-legs spider, any spider of the family Pholcidae.Another spider neighbor that is commonly found in homes is the daddy longlegs. The daddy longlegs is often called a cellar spider. — 2010 formsdaddy longlegses · daddy-longlegses