Full of deep (often hidden) meaning; suggestive or significant in a way that invites interpretation.
彼の意味深長な笑みを見て、会場はざわついた。
Seeing his suggestive smile, the audience murmured.
上司の一言が意味深長で、皆が黙り込んだ。
The boss's remark was suggestive, and everyone fell silent.
その表現は意味深長だが、真意ははっきりしない。
The expression is suggestive, but its true meaning isn't clear.
意味深長なタイトルが読者の興味を引いた。
The suggestive title attracted readers' interest.