(baseball) The baseball statistic of one-base hits or singles. / (baseball) Initialism of first base. / (baseball) Initialism of first baseman.

plural of 1B

(military) Initialism of one ball, one tracer, meaning that the normal rounds in the gun are alternated with tracer rounds.

(telephony) Number 1B traffic service position system.

(baseball) Initialism of one-base hit.

plural of 1BH