1. an auxiliary activity

Similar word(s): avocation, pursuit, sideline

Definition categories: act, interest, pastime, pursuit

2. a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride

Similar word(s): hobbyhorse

Definition categories: man–made, plaything, toy

3. small Old World falcon formerly trained and flown at small birds

Definition categories: animal, falcon

Sentences with hobby as a noun:

- I like to collect stamps from different countries as a hobby.