A more thorough explanation:

Definition: Declared in direct terms; stated in words; not left to inference or implication.

Examples:

• The teacher expressed her disappointment with the students' lack of effort.
• He expressed his love for her in a heartfelt letter.
• The company expressed its commitment to sustainability in its annual report.

These examples illustrate the definition of "expressed" because in each sentence, something is clearly and directly stated. There is no room for interpretation or guessing at what the speaker or writer meant. The teacher expressed her disappointment, the man expressed his love, and the company expressed its commitment. All of these statements are straightforward and leave no room for doubt or confusion.