Does the meaning of the word "alibi" affect a defendant's right to a fair trial?

The appellant conducted the trial and made submissions to demonstrate that Sinclair was responsible for the offences and he was not. The trial judge’s description of the meaning of “alibi” did not affect the appellant’s right to a fair trial. (iii)The rule in Browne v. Dunn

The appellant submits that the trial judge breached his obligation to assist him and erred in law in applying the rule in Browne v. Dunn by drawing an adverse inference as a result of his failure to cross-examine Sinclair concerning the “discovery” of the missing wallet.