Arabic language is known for its omission trait and it has achieved it through its literary work which is known for its simplistic phrase and precise proof of subject, hence this study acknowledges the aspect of omission in Abdullah Al- Khalili's poetry. For this purpose a descriptive, definitive style used for research method by determining omissions and its positions for using the evidence that will be used for indicating the phenomenon that shows the proof of worth for each type of omission. Also to show the opinions of past scholars in the subject at hand extracting the most suitable opinions. The study was divided into three chapters, preceded by an introduction and followed by a conclusion of the results of the study. As for the introduction the aspect of linguistic omissions and its abbreviations was introduced, the reasons, purposes, and conditions of the omissions as specified by previous linguists. Then the researcher moved to the practical side of the study where the first chapter dealt with the aspects of character omissions by using induction methods in areas of omissions and showed different types of omissions of vowels, pronouns, al hamza,al lam, prepositions, conditional phrases, question marks, conditional al faa,and connecting words. In the second chapter the researcher discussed the aspects of the different types of omissions regarding the nouns, as she explained its structure when it comes as a beginning or as an object in nominal clause, subject, object, adjective and as clauses. In the third chapter the researcher discussed/covered the omission of the verb and the sentence so she studied the omission of the verb as an infinitive in the specified parts of sentences, commands part of sentences, encouragement part of sentences, and different types of omissions in sentences that came in the poetry of Abdullah Al-Khalili when it's a conditional clause and the oath sentence. At the end of the study the most significant results were reached.