Definitions:

1. Primarily used in heraldry to describe a fish or other sea creature that is depicted swimming horizontally. ADJECTIVE
   • The knight's banner displayed a shark naiant, an unusual choice that reflected his fierce reputation on both land and sea.
2. Represented in a horizontal position as if swimming. ADJECTIVE
   • The family crest featured a trout naiant, symbolizing their ancestral roots in a village renowned for its abundant rivers.

Synonyms:

• swimming