When I say the word 'abstract', I mean the word as it applies to philosophy and law. Or, if you wish, I mean 'abstract' as in abstract thought, or the capacity for abstract thought. Follow
Intralingual definition, within a given language; of or pertaining to a single language. See more.
Freebase(0.00 / 0 votes)Rate this definition: Intrathecal is an adjective that refers to something introduced into or occurring in the space under the arachnoid membrane of the brain or spinal cord. For example, intrathecal immunoglobulin production means production of this substance in the spinal cord.