à la mode

1. According to the prevailing style or fashion.
2. Served with ice cream: apple pie à la mode.

[French : à, in + la, the + mode, fashion.]

Beef braised in the classic way; also (in USA) fruit or other sweet pie served with ice cream.

[ah lah MOHD] French for "in the manner (or mode) [of]," referring to the style in which a dish is prepared. The term has been Americanized to also mean pie topped with ice cream.

adjective

Being or in accordance with the current fashion: chic, dashing, fashionable, mod, modish, posh, smart, stylish, swank, swanky, trig. Informal classy, in, sharp, snappy, swish, tony, trendy. Slang with-it. Idioms: all the rage, up to the minute. See style/good style/bad style, usual/unusual.

The adjective has one meaning:

Meaning #1: in the current fashion or style
  Synonyms: in style, in vogue, modish

The adverb a la mode has one meaning:

Meaning #1: with ice cream on top or on the side