Definition of "dearer"

Had my friend's Muse grown with this growing age, / A dearer birth than this his love had brought, / To march in ranks of better equipage

1609, William Shakespeare, “Sonnet 32”, in Shake-speares Sonnets. […], London: By G[eorge] Eld for T[homas] T[horpe] and are to be sold by William Aspley

Those lines that I before have writ do lie, / Even those that said I could not love you dearer

1609, William Shakespeare, “Sonnet 115”, in Shake-speares Sonnets. […], London: By G[eorge] Eld for T[homas] T[horpe] and are to be sold by William Aspley