We found one dictionary that defines the word is when:

General (1 matching dictionary)

1. is-when: Wordnik

Types: simile, metaphor, hyperbole, personification, more... Phrases: is happy when, which is when, this is caused when metal gets, that is when, this is caused when metal, more... ▸ Words similar to is when ▸ Usage examples for is when ▸ Idioms related to is when ▸ Wikipedia articles (New!) ▸ Words that often appear near is when ▸ Rhymes of is when ▸ Invented words related to is when