The meaning of morphological categories is reflected in so called grammatemes at the tectogrammatical layer: grammatemes are semantically oriented counterparts of morphological categories such as number for nouns, comparison for adjectives, or tense, aspect and modality for verbs. The system of grammatemes preserves the function/meaning of morphological categories (when representing words with their tectogrammatical lemmas, morphological categories would otherwise get lost at the higher level of abstraction).
The asymmetry between a form (surface morphology) and function/meaning (deep morphology represented by grammatemes) can be illustrated by the following examples: