Leventkitt, J.

This action is brought to recover the unpaid balance of the agreed value of certain advertising furnished the defendant by the plaintiff. The latter did business under the name of The Surface Eailway Advertising Company. On July G, 1895, the parties entered into the following contract:

“ The Surface Eailway Advertising Co. is hereby authorized to insert our advertisement for the term of twelve months, from the average time of the same being placed in the cars (of which due notice will he given), in one space 11 + 21 inches in 150 cars of such railway lines as indicated by indorsement on the hank of this contract, and for1 which we agree to pay the said Surface Eailway Advertising Company the sum of sixtv-seven 50-100 dollars per month — in monthly payments — during the term of this contract. This contract may be discontinued in three months upon payment of $7 50-100 per month additional. The contract to date from July 15, 1895, and the Advertising Co. to furnish one set of signs. This contract is subject to the leases with and the operations of the railroads. Any loss of space or time to be, at the option of the Surface Eailway Advertising Co., made good by-additional space or time on any of said lines, or allowed for pro rata according to the price charged for the line or lines in which such loss should occur. The rights under this contract are not assignable.”

Pursuant to the contract the signs were placed in the required number of cars, and the defendant was duly notified. Three monthly installments were paid. At the expiration of the year, this suit was brought to recover the installments for the remaining nine months. In its answer the defendant alleged that on the second day of Hovemher, 1895, it had notified the plaintiff that it desired to discontinue the advertisement on and after the first *626day of December, 1895, and that it had offered to pay at the contract rate for two months succeeding the fifteenth day of October, and seven dollars and fifty cents additional for each of five months, and that this offer was refused. On the trial the defendant sought to prove this defense, but was not permitted to do so, the judge, holding the contract to be clear and unambiguous, and construing its terms to mean that the option of discontinuance could be exercised only within three months after its date, excluded the written notice on the ground that it had been sent subsequent to the expiration of that period, and he rejected parol evidence to the negotiations which led up to and resulted in the contract. The appellant claims that these rulings were erroneous, and that the verdict directed should not be permitted to stand.

It may be conceded that the instrument is ambiguous in so far as it relates to the time when the right of discontinuance may be exercised. The language adopted by the parties is: “ This contract may be discontinued in three months.” This phraseology may reasonably be interpreted to mean either (1) that the contract might be terminated at any time within three months; or (2) at the expiration of three months. The several meanings of “ in,” as a proposition relating to time, necessary to arrive at these respective constructions find support in the definitions of the lexicographers. Thus, the Century Dictionary, vol. 3, p. 3024, has the following meanings of “ in ” as a preposition of time: (a) Of a point of time, or a period taken as a point; at (b) Of a course or period of time; within the limits or duration of, during; (c) Of a limit of time; at the expiration of. If the dispute between the parties were, which of these meanings the language should bear, parol evidence would have been admissible to show what sense the parties attached to the doubtful term,) and the prior negotiations, which would have elucidated the intent sought to be expressed. Browne, Par. Ev., 118, 179, 180; Agawam Bank v. Strever, 18 N. Y. 502, 508. It is not clear from the instrument whether the defendant could have availed itself of the privilege to end the contract at any time during the three months, or only on the last day of the three months. It is clear, however, that three months was the limit of the time, and that the right to discontinue did not extend beyond that. The difficulty with the contention of the appellant is that neither of these permissible constructions will sustain its alleged defense. -To *627support that would unwarrantably invest “ in ” with the meaning “ at any time after; ” for the notice of discontinuance was admittedly not sent until the fourth month.

The appellant, adopting the definition “ at the expiration of,” unreasonably extends it by adding, in effect, the words “ and at all times thereafter,” so as to carry the option through the remaining nine months of the contract. But “ at the expiration of ” defines a limit of time; it marks the close of a period, not its beginning. When three months had expired the option could have been exercised; after that time the right was gone. It is obvious, therefore, that to have permitted parol proof to validate the attempted discontinuance in the fourth month, would not have fixed which of two reasonable meanings the language imported, but would have substituted a third, destructive of the other two, and would practically have reformed the contract.

The judgment should be affirmed.

Fbeedmax, P. J., and MacLeax, J., concur.

Judgment affirmed, with costs to respondent.