flag

1 :  a usually rectangular piece of fabric of distinctive design that is used as a symbol (as of a nation), as a signaling device, or as a decoration

2a :  the tail of some dogs (such as a setter or hound); also :  the long hair fringing a dog's tailb :  the tail of a deer

3a :  something used like a flag to signal or attract attentionb :  one of the cross strokes of a musical note less than a quarter note in value

4 :  something represented by a flag: such asa :  flagshipb :  an admiral functioning in his office of commandc :  nationality; especially :  the nationality of registration of a ship or aircraft

1 :  to signal with or as if with a flag; especially :  to signal to stop flagged the train —often used with down

2 :  to mark or identify with or as if with a flag flagged potential problems in the proposal

3 :  to call a penalty on :  penalize a lineman flagged for being offside

1 :  to hang loose without stiffness

2a :  to become unsteady, feeble, or spiritlessb :  to decline in interest, attraction, or value flagging stock prices

:  a hard evenly stratified stone that splits into flat pieces suitable for paving; also :  a piece of such stone

:  to lay (something, such as a pavement) with flags (see ⁵flag)

:  a piece of cloth with a special design or color that is used as a symbol (as of a nation) or as a signal

:  to signal to stop flag a taxi

:  to become weak He tried to use the flagging power of his memory … — Lois Lowry, The Giver