| noun | 1/60 of a minute; the basic unit of time adopted under the Systeme International d'Unites |
| noun | an indefinitely short time “wait just a moment” |
| noun | the fielding position of the player on a baseball team who is stationed near the second of the bases in the infield |
| noun | a particular point in time “the moment he arrived the party began” |
| noun | following the first in an ordering or series “he came in a close second” |
| noun | a 60th part of a minute of arc “the treasure is 2 minutes and 45 seconds south of here” |
| noun | the official attendant of a contestant in a duel or boxing match |
| noun | a speech seconding a motion “do I hear a second?” |
| noun | the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle “he had to shift down into second to make the hill” |
| noun | merchandise that has imperfections; usually sold at a reduced price without the brand name |
| verb | give support or one's approval to “I'll second that motion” |
| verb | transfer an employee to a different, temporary assignment “The officer was seconded for duty overseas” |
| adjective | coming next after the first in position in space or time or degree or magnitude |
| adjective | a part or voice or instrument or orchestra section lower in pitch than or subordinate to the first “second flute” |
| adverb | in the second place “second, we must consider the economy” |
| momentary | adjective | lasting for a markedly brief time |
| momentaneous | adjective | lasting for a markedly brief time |
| instantaneous | adjective | occurring with no delay |
| second | adjective | coming next after the first in position in space or time or degree or magnitude |
| second | verb | give support or one's approval to |
| indorse | verb | give support or one's approval to |
| second | noun | a speech seconding a motion |
| secondment | noun | a speech seconding a motion |
| seconder | noun | someone who endorses a motion or petition as a necessary preliminary to a discussion or vote |
| backing | noun | the act of providing approval and support |
| endorsement | noun | a promotional statement (as found on the dust jackets of books) |
| endorser | noun | someone who expresses strong approval |
| indorser | noun | someone who expresses strong approval |
| indorsement | noun | a speech seconding a motion |