Third-person singular simple present indicative form of ahem

(onomatopoeia) the sound of a quiet cough or of clearing one's throat / an exclamation or cough to get attention / an exclamation of disapproval or annoyance / an exclamation to indicate sarcasm

To cough or clear one's throat so as to draw attention.

simple past tense and past participle of ahem

present participle of ahem

(biology) Cyclical, with a period not equal to 24 hours

plural of ahemeral day

(biology) A light-dark cycle that has more or less than 24 hours created artificially for testing the rhythms of organisms.