1. Not flowing or moving; still or motionless (referring to water or liquids)
The stagnant water in the pond was full of algae.
A água estagnante da lagoa estava cheia de algas.
2. Lacking growth, progress, or development; inactive or sluggish
The economy has been stagnant for the past two years.
A economia tem estado estagnante nos últimos dois anos.
3. Dull, tedious, or lacking vitality
The conversation became stagnant and boring.
A conversa ficou estagnante e entediante.