Final answer:
In Spanish, 'mayor' and 'menor' are used as comparative forms of 'grande' and 'pequeno' respectively when comparing age, indicating 'older' and 'younger'.
Step-by-step explanation:
When grande and pequeno are used in the Spanish language to compare age, they can be nuanced to indicate 'older' and 'younger' respectively, rather than their literal meanings of 'big' and 'small'. To form comparatives that refer to age, you would use 'mayor' for older and 'menor' for younger. For example, 'Mi hermano es mayor que yo' (My brother is older than me) or 'Mi hermana es menor que yo' (My sister is younger than me). These terms are used instead of the usual comparative forms of grande and pequeno when specifically referring to age.