Definition of blob noun from the Oxford Advanced Learner's Dictionary

 

blob

 noun
noun
BrE BrE//blɒb//
 
; NAmE NAmE//blɑːb//
 
 
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a small amount or drop of something, especially a liquid; a small area of colour a blob of ink a pink blob The street lights in the distance were blobs of orange light. She gave me a big blob of cream on my raspberries. Word Origin late Middle English (denoting a bubble): perhaps symbolic of a drop of liquid; compare with blotch, the noun blubber, and plop.
See the Oxford Advanced American Dictionary entry: blob