Interjections (ouch, hooray)
We use interjections to express emotions such as pleasure, surprise, shock and disgust. Most interjections are just sounds, rather than actual words, and come at the beginning or at the end of what we say. Interjections are more common in speaking than in writing: …

interjection | American Dictionary

interjection
noun[ C ]
us/ˌɪn·tərˈdʒek·ʃən/
grammar
a word or phrase that is used as a short, sudden expression of emotion:
"Hey!" "Ouch!" and "Cut that out!" are interjections.

Examples of interjection

interjection
Four other classes fell into the group of moderate frequency : pronouns, interjections, fillers, and determiners.
Another look at, say, some grammatical constraints on, oh, interjections and hesitations.
One difference is that now deictic elements and interjections are included.
Also, the interjections ' 'hmm' ', ' 'mm' ' and ' 'oh' ' were excluded on the intuition that they were less word-like than other words.
The lexicon covers approximately 700 unique words (nouns, verbs, adverbs, adjectives, prepositions, numerals, and interjections).
The proportion of interjections by children and adults in oneword utterances is nearly identical.
D-deleted forms were used with catar 'try', mirar 'look', and andar 'go on' as attention-getting interjections, as opposed to their basic meanings.
The fiery sections were also exciting, sinewy cello solos overlaid with percussive orchestral interjections that take on urgency, as in a conversation that gains momentum.
Towards the end, the viola presented a memorably ardent cantabile rendering of the keening lament, brutally interrupted by tormenting tutti interjections.
During the two solo episodes the strings provide an accompaniment typical of the solo concerto: written-out continuo chords (piano) alternating with short interjections in octaves (forte).
Chimera for chamber ensemble (2000) presents a continuous pulsating rhythm and repetitions of short figures, and the sudden interjections of foreign elements create hybrid constructions suggestive of the title.
Analyses of word class distribution across time indicate that the frequency of types of para-lexical items is primarily due to the prominence of two classes, fillers and interjections.
Other interjections, however, have more specific lexical forms, such as \\hai\\ or ' yes,' \\ame\\ used when experiencing unexpected events, and \\homa\\ used to draw one's attention.
If interjections are not taken into account because they may be considered as specific to children, the result is even more significant, r l 0n56, p 0n005.
The schism lies between the ideological freight the novel's allegory and authorial interjections represent, and the emotional reaction the text is likely to evoke from a reader.
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These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.