(with superlative) After the first; at the second rank. / After the first occurrence but before the third.

One-sixtieth of a minute; the SI unit of time, defined as the duration of 9,192,631,770 periods of radiation corresponding to the transition between two hyperfine levels of caesium-133 in a ground state at a temperature of absolute zero and at rest.

A second helping of food for one person, or refill of coffee or other drink. / An item of clothing that has failed quality control and is sold at a discount

Third-person singular simple present indicative form of second

Number-two; following after the first one with nothing between them. The ordinal number corresponding to the cardinal number two.

plural of secondment

The process or state of being seconded, the temporary transfer of a person from their normal duty to another assignment.

present participle of second

The quality of being or coming second.

Eggcorn of second of all.