1. having the form or nature of air; gaseous
Usage: technical; formal
2. unsubstantial; lacking physical form
Usage: literary; formal

Examples

• The scientist studied the aeriform properties of the heated substance.
• Steam is an aeriform state of water.
• The aeriform vapors rose from the laboratory beaker.
• Her dreams seemed aeriform, impossible to grasp or hold.
• The aeriform nature of the gas made it difficult to contain.
• The poet described love as something aeriform and fleeting.