To grow older; to reach maturity.

simple past tense and past participle of senesce

Third-person singular simple present indicative form of senesce

plural of senescence

(biology) The state or process of ageing, especially in humans; old age. / (cell biology) Ceasing to divide by mitosis because of shortening of telomeres or excessive DNA damage.

Growing old; decaying with the lapse of time. / Characteristic of old age. / (cytology, of a cell) That ceases to divide.

present participle of senesce