To show, point out, or make known.
“The letter indicated that the shipment would be delayed by two weeks.”
“Please indicate your preferred appointment time in your reply.”
'Indicate' is a common formal verb in Reading Part 1 letters, used when the writer points out information, a preference, or a problem. Questions may ask what the letter 'indicates', which is often a paraphrase of directly stated information.
Synonyms: show, signal, point out