To convey a thought or feeling in words or by gestures and conduct. She expressed her gratitude with a heartfelt speech.
To represent or symbolize something. The artist expressed his emotions through his paintings.
To press or squeeze out (a liquid or substance). He expressed the juice from the orange using a manual juicer.
To send something using a fast delivery service. They expressed the package to ensure it arrived the next day.
(Genetics) For a gene, to transcribe and translate into a functional product such as a protein. The engineered yeast cells expressed a human insulin gene.