Countable: an utterance of the sound 'ahem'.
Definitions
An utterance of the sound “ahem”, typically used to draw attention or convey embarrassment. With a discreet ahem, she reminded them that the time was up.
Informal, intransitive: to utter the sound 'ahem'.
Definitions
To make the sound “ahem” in order to attract attention, express embarrassment, or hint at something. He ahemmed loudly to signal that the meeting should begin.
Synonyms
clear throat
make a throat-clearing sound
clear one's voice
clear one's throat