1. left shift - Noun
2. left shift - Verb
(computing) A bit shift to the left, in which all of the bits of an operand are shifted by a given number of positions to the left.
(computing) The left shift operator; often given as << or <<<.
left shift (third-person singular simple present left shifts, present participle left shifting, simple past and past participle left shifted)
(computing) To perform a left shift bitwise operation.