Definify.com
Webster 1913 Edition
Interjection
1.
The act of interjecting or throwing between; also, that which is interjected.
The
interjection
of laughing. Bacon.
2.
(Gram.)
A word or form of speech thrown in to express emotion or feeling, as O! Alas! Ha ha! Begone! etc. Compare
Exclamation
. An
interjection
implies a meaning which it would require a whole grammatical sentence to expound, and it may be regarded as the rudiment of such a sentence. But it is a confusion of thought to rank it among the parts of speech. Earle.
How now!
interjections
? Why, then, some be of laughing, as, ah, ha, he! Shakespeare
Webster 1828 Edition
Interjection
INTERJEC'TION
,Noun.
1.
A word in speaking or writing, thrown in between words connected in construction, to express some emotion or passion. 'These were delightful days, but, alas, they are no more.' [See Exclamation.]