1. having thin consistency

- a tenuous fluid

Similar word(s): thin

2. very thin in gauge or diameter

- a tenuous thread

Similar word(s): thin

3. lacking substance or significance

- a tenuous argument

Similar word(s): insignificant, unimportant, flimsy, fragile, slight, thin

Sentences with tenuous as an adjective:

- The aether was thought to be of tenuous strands.

- His argument was not convincing in the debate, considering how tenuous it was.