* Serious: This is the most general antonym, suitable for situations where "funny" means humorous.
* Boring: This is a good antonym if "funny" means entertaining or interesting.
* Dull: Similar to "boring", this suggests a lack of excitement or humor.
* Uninteresting: This emphasizes the lack of appeal or entertainment value.
* Sad: This is relevant if "funny" refers to a lighthearted or joyful mood.
* Tragic: This is an antonym if "funny" refers to something lighthearted or humorous.
Example:
* "That joke was funny, not serious."
* "The movie was so boring, not at all funny."
* "The lecture was dull, not funny."
* "The meeting was uninteresting, not funny."
* "He seemed sad, not funny."
* "The play was tragic, not funny."